How to get rid of spider mites on your medical marijuana

the answers is: drum roll please .  try azamax, if all else fails .   malathia .  used it love it . only last resort. use neem oil every 7- 10 days and usually knock on wood it prevents them(only during vegative cycle ).  also rock bud soma a is the most resistant to spider mite fyi...... 

The following comes from a friend of mine at the MSU Botany Department regarding Spder Mites.  This process has been used by at elast 10 people I gave it to, and it worked 100% for everyone!  Bye-Bye Spider mites.

Three step cure.  This is all as close to organic as you can get.

1.  Get some Monterry Spray.  Search the internet, you will find it.  It contains "Spinosad" which is a product from a plant or tree.  Totally organic.  Read the label follow instructions.  It worked for us after one application.  I think this is around 20.00 per bottle.  The bottle will last forever if used properly.

2.  Get some "Mosquito Dunks"  These are organic little donuts that you soak in your water.  Use the water as you normally would for a couple of weeks.  It will kill all eggs and larvae in the soil.  This is totally safe and 100% organic also.  Search internet they are there.  About $10.00 for 6.

3.  Get some sticky traps or tangle trap.  Put them in your plant pots.  This will catch everything the Monnterry and dunks don't.  I always use these when I start a new plant pot.  They also catch any soil gnats that may hatch at the same time.

Try this folks if you have a problem.  I know that it works.  Let us know how you make out if you try it.  I will also post comments on prevention at a later time.  An oz. of prevention is better than a lb. of cure.

Mike D.- TopMiCaregiver

einstein oil is the best shit that i know about.use it in conjunction with sm-90.alternate every time.use agri-2 wetting agent with both.both are organic.fuk pesticides!!!!!!!!!!!!!!!!

Spider mites are by far the worst pest to have, because they are the hardest to kill and can literally kill any plant. They are by far more active in warmer climates than cold ones, they also suck sup from the leaves leaving tiny white spots on the leaves from where they suck on. The damage they do is just like thrips, but with spider mites they pierce the surface of the leaves and can show tiny holes or white speckling damage, unlike with thirps they eat the surface of the chlorophyll. You can tell when you have infestation of spider mites , because you will have distorted growth, shortened internodes and petioles.
When you have bad infestation you will see webbing with larva in them. You get spider mites from either store bought soil mostly when your soil is not sterilized. Most brands do not state weather or not they are, chances are if you buy cheap soil, you have a less likely chance of the soil being sterile.Also, bringing outdoor plants indoors, or getting plants from someone else who was infected with spidermites.
Spider mites live on the plant itself and are under the leaves most of the time and are usually are so tiny you can’t see them with the naked eye. In order to get rid of spider mites one of the best ways to start to get rid of them is to use NO-Pest strips.NO-Pest strips work well and should always be used with other methods. Neem oil helps get rid of them as well. Also by raising the humidity in your grow room a lot will kill the spider mites off, by them absorbing to much humidity and will burst. You can use soap solution like Safer Insecticidal Soap to get rid of most aphid problems. Use some tobacco juice and chili pepper powder added to this for mites. (see below how to make tabacco juice)
Pyrethrum should only be used in extreme circumstances directly on plants, It starts to breaks down around a week and is easily washed away with clear water or. If your plants are in flowering and you have spider mites, using safer chemicals is your best bet. The tobacco and pepper soap solution works well and should be used daily, spraying on the underside and top leaves and later the whole plant. Since spider mites are very residual to common products, you have to find or try any number of ones untill you get rid of them. make absolutly sure you retreat as stated, other wise you will get resistant spidermites and then you have a bigger battle on your hands.Also do not allow pets that go outside alot to be around indoor plants,mites have been known to be carried in from pets to plants. PLEASE NOTE, below are ways to get rid of spider mites, but no 2 mite infestations are identical, you almost always have to use different products to get rid of them, also make a habit to check for at least a whole month after thinking you got rid of them, that way your chances of the spider mites that became resistant breeding and then having a bigger problem. Make sure you spray your plant down very good and enough and on time.
Here are some more products that may help get rid of spider mites:

Hot Pepper Wax,Safer Yard & Garden Insecticide (which can be used right to the day of harvest),GNATROL( used in hydro in the water as well as soil),Doc's Neem Pest Soap,Safer Sticky Stakes,TR-11000 Pyrethrum. Anything that says dicofol on the back. ( should be used in vegging or early flowering)

Avid
GNATROL( used in Hydroponics/Aeroponics in the water as well as soil)
Safer Sticky Stakes
TR-11000 Pyrethrum
Anything that says dicofol on the back. ( should be used in vegging or early flowering)
PERMETHRIN dust

Organics

Organocide
Hot Pepper Wax,
Safer Yard & Garden Insecticide
Doc's Neem Pest Soap
Organocide
Bugzyme Natural Pest Killer
Schultz-Instant Insect Spray
Lady Beetles (Beneficial Insect)
Predatory mite (Beneficial Insect)
Pirate Bugs (Beneficial Insect)
Neem Oil
Neem 2

Tabacco Juice recipe

Take 3 strong ciggeretes soak them over night in water
Boil it for 2 to 3 miniutes, let it cool off and spray the plants 3 to 4 times a week. You can add safer soap if you like to the mixture.
(make absolutly sure you use gloves/face protection while handling and spraying)
Neem oil works very well too!!
ZBQ has an excellent thread on how to use neem oil without geting your plants to oily!! http://www.overgrow.com/edge/showthr...hreadid=482648 :tup: Your Last resort is to use Avid.

Pictures 5 shows spider mites and there larva. Picture 6 shows spider mite damage. Picture 7 shows SPidermites larvae and spidermites closeup( Picture contibuted by sukalo)

Thrips

Thrips are really tiny, but can be seen by the naked eye. Some may have wings and some may not. Thrips reproduce rapidly, especially in tight places. That is what makes them hard to get rid of when using pesticides. The suck the sap right out of your plant with there piercing mouths, which makes the leaves look like they turned white. You can tell when you have thrips by taking a look at your leaves, the leaves will look as if there chlorophyll have been ripped right off the plant. Plants that are damaged can’t be healed thus making it harder for the plant to absorb light. SO if left untreated the thrips will kill the plants. Damage also can be seen by the greenish black specks of there poop they leave on leaves. Also the plants will show silver patchs from scar tissue. Depending on the severity at first, thrip damage might look like spider mite damage untill it increases in damage and then thrips case is for sure when you see the greenness replace with big parts of white.Thrips also can causes viruses to the plants and any larvae infected will breed more infected pests!. While they suck, the plants release honeydew which can contribute to mold on your plants. Adults have wings but do not fly well, but rather jump more. There are different kinds of Thrips, some more resistant to chemicals. Thrips can also carry plant pathogens in there mouths and carry it to other plants increasing the chance for your plants to get infected. . If your plants are affected during late flowering or close to harvest, please try to use the safest means of control to be safe to your health.

Control

One good way to repel thrips for those growing outside is to use garlic, this is a good way to keep them away before you get them. The color yellow attracts the thrips and should be advised not to have this color around your grow.. If you already have them using neem oil, and or lady bugs can get rid of them. If the infestation is bad then you need to use biological solution like, pyrethrin-like insecticides.

Other Products include:

Chemicals
Hot Pepper Wax,Safer Yard & Garden Insecticide (which can be used right to the day of harvest),GNATROL( used in hydro in the water as well as soil),Doc's Neem Pest Soap,Safer Sticky Stakes,TR-11000 Pyrethrum.

Picture 1 is Thrip damage
Picture 2 is Thrip Larvae (Picture Contributed by: Flatt)

Caterpillars (cutworms, cabbageworms, ect.)

There are several different kinds of catapillars that may affect cannabis plants, mainly the ones that affect the plants, do almost the same damage, some do more severe depending on the numbers you have eating on your plants. Most caterpillars will do damage by chewing holes in the leaves, the holes will be kind of big, if so you know it’s not going to be a smaller kind of pest.
If you find caterpillars have been eating at your plants and you need to get rid of them; there are several non-toxic and least toxic methods to choose from. You can also shake your plant a bit to make the caterpillars fall off your plants. . If your plants are affected during late flowering or close to harvest, please try to use the safest means of control to be safe to your health.

Prevent and Control

Hand picking: Easy way to control them is to pick them up and knock them into a bucket of soapy water. If you are scared about handling caterpillars, you can use some gloves or have someone else pick them up for you.

PERMETHRIN dust
BTK in dust form can be used to kill caterpillars. BTK can also be used to foliar spray your plants. One tablespoon of neem oil added to your BT mix helps stick the mix to the plants better when you are foliar spraying.. BTK is available in liquid form. Apply BTK on all of the leaves both top and underside If you decided using the dust kind,spray your plants down with water before you apply the dust Apply every week to 2 weeks and or after it rains. The caterpillars must eat the BT as they are feeding on foliage in order for the caterpillars to be rid of.

Organic

Insecticidal soaps, neem, oil, and spinosad are the safest insecticides that can be used to control.. Soaps and neem are non-toxic and are great to use when you have a lot of pests and want to be friendly to nature and its animals. Spinosad works very very good in controlling the caterpillar population and is non toxic to wild-life, pets, and humans. It hardly has any impact at all on the plants.

Picture 1 shows caterpillar damage

Slugs and snails (Outdoor Growers)

Both slugs and snails travel by secreting a mucus or slime on which they glide. When you see the slime trail on your plants and have damage, then it was most likely caused by slugs or snails.When your garden is very moist slugs and snails can live for a long time as this is the key to them living a long time. If you keep your garden not as moist and dark slugs and snails cannot live as long. They stay away from the sunlight along with hiding around moist dark areas in the garden.They also hide in Mulches, short stubby plants, boards, and in the soil. They come out mostly at night and on cloudy days. They feed by chewing holes into your leaves and can clip the edges of leaves and flowers.Slugs and Snails are mostly pests of seedlings and herbaceous plants that are close to the ground. In order to confirm the damage was caused by slugs or snails, look for a silvery trail of mucous.

Controls

Snails can cause massive damage to gardens if given a chance. It is very unlikely you will be able to completely rid your garden of them, but try to keep the numbers down as much as possible to keep healthy and undamaged plants. Here are some ways to control slugs and snails.

Reduce slug and snail damage dramatically by watering in the morning instead of the evening.
If you do see any slugs or snails avoid putting mulches and dark hiding cover.Oak leaf mulch will deter slugs and snails.
Handpick slugs and snails at night. Use a bucket to put them into soapy water.
Lay boards down in the garden to trap slugs and snails.
Diatomaceous earth sprinkled around you’re your plants base of the stems will help keep out slugs and snails, but it can also stop other beneficial insects.

Soak the soil with wormwood tea.

Put copper wire around your garden or at the base of your.Slugs get a big shock when they touch copper Just make sure you don’t trap them inside your garden when you put copper around your garden.

Beer is good to use, because slugs love beer!. Take a container of beer and bury it in your garden with it just barly above the ground so they can drink it and drown.

And one of our favorite additives.... SALT!

Predators that like to eat snails include:snakes, toads, frogs,fireflies, predatory snails, birds, beetles. The large, black iridescent beetles you see in your yard are predators. Firefly larvae eat on slugs and snails and can literally wipe out the development of them by eating 40 to 60 snails from just 1 larve of a firefly!!

Please be kind to nature and pets and stay away from poison slug bates. If you have seen what it can do to pets you wouldn’t want to ever use it again!!!

Poisonous baits are hazardous to all living beings and animals. Slugs and snails can become resistant to baits. So its better to use other methods and stay away from chemical baits, all the while protecting nature.

Leaf miners

These Little creatures are a pain to get rid of, the miners eat and dig squiggly lines into your leaves all the while planting there larvae in them making it hard to get rid of them. They plant there eggs in the leaves in mid When they hatch they feed off of your leaves untill they get big enough to pupate. Pupation occurs within the leaf or in the soil beneath the plant. After they emerge the entire cycle will start over and you will have a bigger infestation. You can tell you have leaf miners by looking at your leaves; it will look like someone carved scribble lines all over the plants leaves. Leaf miners also can leave your plant open to pathogens and fungus and low yields from the damage to the leaves. The females dig into the leaves and lay there eggs, the sap that is secreted when the leaf minors do damage attract ants and flies. . If your plants are affected during late flowering or close to harvest, please try to use the safest means of control to be safe to your health.

Controls

Controls: Natural control for these insects is difficult. You can remove affected leaves and discard them. Chemical control is hard and is ment towards the emerging adults. Since the larvae is well protected within the leaf. Neem oil will work well.

Pictures 3-4 shows leaf miners attack

Scale (Outdoor Problem)

Scale can be found on stems, underside of branches, trunks, young trees or shrubs. They usally emerge from there eggs around March to Aug and make there homes on the plant. They pierce the cells and feed on the sap of the plant. After they have a place on your plant they devlop a very hard shell which protects them from other preadatory insects and chemical compounds to get rid of them. After they develop this hard back the secreation they drip attracts ants. Now since the ants travel over the scales thus dragging it all over your plant spreading the scale from one place to another on the plants. When the secreation falls on leaves it can make a type of mold called Sooty Mold which makes the leaves look dirty and black.

Pictures show Scale infestation:
(Photo Credit: Meddev)

Sooty MOLD

The problem with this type of fungi is that it attracts several types of sucking insects,like Aphids, Mealy Bugs, Thrips, and Whiteflies..This mold is so dark that it affects the plant by inhibiting the light from reaching its leaves which stops photosynthesis, which in turn makes the plant die.

Control

The waxy layer that is on scales protects them from insects and other pesticides. In order to get rid of them Use a horticultural oil to kill the adult populations throughout the year. If you can combine the oil with the insecticide, such as, Orthene, Sevin, or malathion it can almost wipe out the scale population along with the sooty mold it causes!Neem soil works very well too!

You can do a few things.. more if your not nearing the end of harvest..

1) take a pack of chewing tobacco, mix it with a gallon of water, let it brew for a day.. spray the plants down as needed.. if your a cigarette smoker no worries spray em down till harvest.. watch for mold..

2) take some safers natural soap, mix it with some water so its a soapy slippery mixture, soak em down.. the idea is to suffocate the bugs in the soapy bubbles..

Ants

Ants are all over the place indoors and outdoors. Ants can be a pest in your garden, because there homes are underground in the colonies which require them to burrow through and thus causing root hairs and roots to be damaged from there digging.
Though generally they do not cause damage to the leaves from biting they may be eating dead leaf tissue, there may also be a hidden side to ants. Ants can carry aphids to your plants and thus causing the infestation, they can also be attracted to your plants if you already have a pest infestation. Aphids, mealy bugs, white flies can secret a sticky substance known as “honey dew” which is a sugar concentrate from the plant's sap after aphids have excreted it on the plant. Ants love this and which is why they are attracted to plants that have an infestation. This honey dew that is secreted from pests can attract sooty mold where ever the honey dew is secreted on the plant.( See Sooty Mold for Details) If your plants do not have an infestation of pests, but you see ants you need to get rid of them, because of them being able to carry pests to your plants.
Ants are generally attracted to plants that already have aphids; white flies mealy bugs and scales. You can see ants on the plant and around the soil and in the soil. Your plants may show a different number of problems, but the main damage is not caused by the ants, it’s the pests that the ants may bring in or what they are attracted to on your plants.

Prevent and Control

To make sure you can keep ants away from your plants, you need to make sure your plants are free of insects and other pests that ants are attracted to. There are many ways you can deterrent ants from wandering into your grow area.
Boric acid is an inorganic powder that must be kept away from children and pets. Sprinkling it around your soil will help kill them when you water your plants, while the boric acid gets into the soil. Boric acid will not be toxic to your plants; it is also used for a cure when your plants have a boron deficiency. Do not apply boric acid on the plant itself; this is for soil plants, and areas around your plants that are outdoors.
Sticky traps or tangle foot can help for the upper parts of the plants that have ant infestation. Cucumber parings can also be used as a repellant. Lemon Juice mixed with 50/50 water can be sprayed on the plant as a repellant. Using common herbs like sage, mint leaves, and spearmint. Mixing some of these with water can be used to spray onto the plant. Using peanut butter ball with a bit of sugar on it can be a sticky trap where they can’t get out of. You can put it near the soil or small bits on the leaves, or where high infestation areas on your plants. Watering your plants with apple cider vinegar can make them come up and can also kill the larva in the soil. Flushing well before using methods can help out a lot due to flooding the nest makes them come up out of the nest and killing there larva from drowning. When they come up using a deterrent can chase them away, if not use any one of these items to kill them or deterrent them. Chemical Control should always be the last resort for cannabis plants. Other ways to combat ants with chemical ways:

Chemical Control

pyrethren
Malathion Plus
Insect spray concentration
Ant Baits
Ant be gone baits

Organic Control

(Deterrents)
Sage
Instant Grits (causes dehydration)
Cayenne pepper
Citric extracts
Cinnamon
Cream of tartar
Salt
Peppermint
Sage
Spearmint
Cucumber parings
Peppermint tea
Schultz-Instant Insect Spray

(Deterrent and Kill)
Water with apple cider vinegar
Flooding the nest with lots of water
Boric Acid
Orange peels, chopped, or grinded and lay on the soil top.
Orange Guard
Boric Acid mixed with sugar and water added a bit of peanut butter and laid in the soil.
Safer Sticky Stakes

04-30-2005, 02:20 AM	#7
MynameStitch Dr. Doolittle     Join Date: Mar 2004 Location: Wildlife Prairie Park Posts: 4,821	Miscellaneous Sick Plant Troubles

This picture is caused by temperature changing from cold to warm, cold nights and warm days.

Some varieties, like equatorial sativas, don't take well to cold weather. If you can keep the roots warmer, the plant will be able to take cooler temps than it otherwise could. Also note that in colder temps, phosphorus gets poorly absorbed and if this happens your plants can show purpling of the leaves and stems, (cannabis has a natural purple color to it's stems, the deep purple is what shows the problem)this is the same example when plants change color in flowering when environment triggers cause the plant to change color, also genes play a role as well.

This picture below shows phosphorus being locked out due to cold temps.
(Photo Credit: TikTok420)

Another lockout of phosphorus due to cooler temps

This picture is what light bleaching/ light burn looks like.
Only way to fix this is to Move the lights away from the plant!
Or make sure you dont go over 75 watts a sq foot, or your plant will have to much light and light bleaching can occur anywhere on the plant. (indica species seem to bleach easier than sativas imo.)

(Picture Provided by Boy Howdy)

These pictures is what heat stress looks like.
Only way to fix this is to Move the lights away from the plant!
And get better ventalation, and or add more fans! Heat - If the lights are too close to the plant, the tops may be curled,
dry, and look burnt, mimicking a
nutrient problem. Your hand should not feel hot after a minute when you hold it at the top of the plants.

(Picture 1 and 2 Provided by Mosfed)

Nutrient Burn :teef:

Nutrient Burn is one of the MOST common mistakes a new grower makes, reason for this is, because a newer grower will use a chemical nutrient most of the time and listen to the directions on the box. This is a NO NO! Depending on the age of the plant, size, strain and soil mixture you are using also has a factor. There is no set guideline when using nutrients, but I can give you a good example to start out with so you will not burn your plants. It’s always good to start out light, rather than feed heavy. Remember you can always add more later, but can not take out when you added to much. Chemical and Organic nutrients differ. Chemical nutrients are more readily available and can burn way easier than organics can. Organics are easier for a newer grower to use, most of the time, and lessen your chances of burning your plants.
I recommend not using more than ½ teaspoon of chemical nutrients per gallon of water. Unless the plants are very big 5 feet+, then it’s safe to use 1 teaspoon per gallon of water. When your plants first emerge you want to wait at least 2 weeks before feeding your plants, unless your plants are in a soiless mixture, like pro mix. The cotyledons (its first set of round looking leaves) are what give the plant its food until they get the first 2 or 3 sets of leaves. If your plants are in a soiless mixture and are over the first week of age; you can feed a weak amount of nutrients, like ¼ teaspoon per gallon of water. Soiless mixtures are different from soil plants and soiless plants need to be fed more when using this mixture.

I also recommend not feeding more than 1 time a week if using ½ teaspoon per gallon of water for chemical nutrients. You can feed every other day,( this goes for chemical and organics) at very weak amounts, but doing this may contribute to over watering, and for that I do not recommend feeding more than once a week. Some people feed 2 times a week using like ¼ teaspoon per gallon of water.. Use 1/4 strength for first feeding and then go up to 1/2 strength from the 2nd feeding when using chemical nutrients. It’s very easy to overdo it. When using organics, depending on which one you’re using, I recommend using 1 teaspoon per gallon of water. When the plant gets bigger you can work your way up to using more nutrients when the plants get bigger.

As for soil mixtures, there are a lot of different kinds of soil’s out there. Using a rich soil mixture is not recommended for seedlings. Seedlings that are under 2 weeks of age you do not want to start them in rich soil, using a seed starter mixture is one of the safer ways. Seed starter mixtures are weak in nutrients, so it will not burn the seedlings but will provide them enough to get past seedling stage, but the downside is you have to transplant into a better soil mixture after 2 weeks of age. If you decide to start with this mixture, do not put your seedlings into a big pot. Start them out with using a cup or a small pot.

Nutrient Burn causes leaf tips to appear yellow or burnt. They can also be brown and twisted and crispy looking. Depending on the severity it can show many different symptoms and shows on lower part of the plant when its young, at older stages it can move anywhere on the plant.

To fix the problem when you have Nutrient burn, you want to flush out the plants with lots of water.

Soil

Soil should be flushed with lots of water, Use 3 gallons of water per one gallon of soil. Flush very thoroughly, after plant recovers usually after a week, you can resume using nutrients after a week or a week 1/2. When you flush your soil, you flush everything out, a lot of nutrients go with it, including the soil nutrients.

Hydro

Change out the reservoir, flush out any lines and clean out the entire system and replace with plain water for the first hour, then start out with lower parts per million (PPM)
Its good to clean out your system every 2 weeks and replace with fresh water and nutrients. Some people change everything every week!

Ahh, nute burn! Stop this by not adding to much chemical/organic nutrients to your water,foliar feeding. DONT feed more than 1 time a week unless using weak amount, use 1/4 strength for first feeding and then go up to 1/2 strength from then on when using chemical nutrients. Its very easy to overdo it. Causes leaf tips to appear yellow or burnt. NEVER give nutrients to plants that are under 2 weeks of age, at this age the soil nutrients are enough to suppliment them untill 2 weeks of age or more depending on how good your soil is. Using ferts before 2 weeks will almost likley kill your plants.

Pictures below show nutrient burn
(photo 1 credit: Hansi)

Picture 3 shows recovery of nutrient burn
(Photo Credit: The King Of New York)

Stem Problems
Stem Breakage - Everyone from time to time has had this problem or will. This is when your stem is broken. Stem breaks can come from a number of things: training, dropping something on it, animals, weather. No matter how it happened the most important thing is to not panic.
Solution - Fixing this is not really a problem. Splint it with something and tape it in place. Marijuana has a great ability to come back even after a stem break. Give her a week or so to recover before she will start to grow again. And be more careful next time!

Misc things to know!!

When your humidity is low your leaves can become shriveled. Using humidity around 40-60% is fine for vegging and flowering.

If your plants are stretching than it can be caused by a few things. Not enough light, or it’s the wrong kind of light. Stay away from incadesant bulbs they produce more heat than good. Same goes for halogens, they are worthless and cause more heat than anything else. Instead get a HPS, MH, Fluros or some compact fluros!
Hps will keep your plant short and stubby while cool fluros will keep your plant bushy, while soft white will keep your plant tall,Having a mixture will have a tal and bushy plant! Nothing wrong with having mixed spectrums!
Or just go grow outside and save energy!!

Cloning Problems

A lot of times clones will yellow, when trying to root, some yellowing is alright, but if the yellowing is taking over and roots have not shown, you need to check to make sure the growing medium is close and tight to the stem. Allowing any air to get down into the hole will dry out the lower stem and can delay roots growing. Also making sure the medium is moist, but not saturated is important. Lighting does not have to be to close when they are un-rooted, after showing roots is when it’s important and the light needs to be closer.
Plain tap water that is ph adjusted is just fine till the clones have rooted. Giving any nutrients will kill them until they have been rooted, even then when giving clones nutrients for the first time needs to be a little bit weak.
If you are using a dome for cloning, you want to make sure if you do mist your plants, do not mist them heavily, you don’t want to spoil your plants, misting to heavy will delay rooting as well, you want your plants to grow roots to go get the water, they will root more slower if the water is readily given to them. Not to mention when you mist them a lot, your plants will have to be “weaned” from there dome. Your plants will droop quickly if taken out of the dome after they have been rooted. In order to stop this, do not mist them so much. If you are having problems with droopy clones, you may want to try an anti droop spray. This will help the plants stop drooping as bad. You can kill clones by not weaning them out of the dome or cause stress and stunt them. I have my own cloning method that stops the weaning process while using a dome, So remember don’t soil your clones by misting them daily, making sure your mediums you are using for cloning are moist enough to last through the cloning process, but not saturated. If the temperature in the medium where the roots are at is under 65 degrees, you'll want to use a heating mat. Temps of around 75 to 80 are optimal. Anything over 80F will cause transpiration and dry out your medium to quickly and roots will not have a chance of growing. Colder temps cause roots to slow causing yellowing in the leaves and stunting. Yellowing on the leaves of a clone is not always a sign of cold temperatures, there could be other problems like medium being too saturated, roots being delayed from cloning method, water temperatures being to warm if using a bubble cloner. Leaves that turn yellow on clone’s means it is using stored nutrients from the leaves to help it try to root. Clones that become cold before having a chance to root will less likely root at all.
Some strains are more difficult to clone than others, some can also root faster and some can take much longer. It seems indica dominant strains have a much easier time cloning, where sativa dominant strains are pickier and require “tweaking” your cloning method if you want to get a higher success rate.

Yellowing leaves on cuttings

When unrooted clones start to yellow it means they are either not touching the rooting medium good enough, to much co2. The vast majority of the time, an unrooted cutting will begin to yellow some of it's leaves, starting with it's largest oldest leaves, because it is too close to the lights and it needs to be moved farther away. Some yellowing is normal just as the cutting begins rooting and can be a sign of the cutting using it's oldest leaves as a food source while it is forming new roots. Plain tap water that is ph adjusted is just fine until the clones have rooted. Giving any ferts will kill them untill they have been rooted.

Seedlings Stretching

If your plants are stretching than it can be caused by a few things. Not enough light, Light not close enough, or it’s the wrong kind of light. Stay away from incandescent bulbs they produce more heat than good. Same goes for halogens; they are worthless and cause more heat than anything else. Instead get a HPS, (High Pressure Sodium) MH, (Metal-Halide) Florescent Tubes, or some compact florescent!
HPS will keep your plant short and stubby while cool florescent tubes and compact florescent (blue spectrum) and MH will keep your plant bushy, while soft white will keep your plant tall, having a mixture will have tall and bushy plants! Nothing wrong with having mixed spectrums!
Or if you can safely, just go grow outside and save energy!!

If you are running in hydro its good to change your water every 2 weeks TOPS to keep out bacteria growth and to keep your plants with a good supply of fresh water.

A good rule to go by for how much PPM each part of your plants growth has is as follows:

(This is just a guideline and in different situations the ppm would need to be changed)

Seedlings should be around 50-150 PPM
Unrooted clones to be around 100-350 PPM
small plants to be around 400-800 PPM
large plants to be around 900-1800 PPM
Last week of flowering use plain water.

If you see dark or patchy spots on your leaves, that could mean you have mold. Check fordark patchy areas on the leaves and if you do have mold, lower the humidity and get a better ventilation setup going to prevent further occurrences.
And most important.. KEEP YOUR GARDEN CLEAN!!!

PPM = parts per million
EC = electric conductivaty
TDS = total desolved solids
(information provided by syko2)

PPM--EC conversion Chart

Re-printed with Permission from Jorge Cervantes;

EC Hanna Eutech Truncheon CF
ms/cm 0.5 ppm 0.64 ppm 0.70 ppm 0
0.1 50 ppm 64 ppm 70 ppm 1
0.2 100 ppm 128 ppm 140 ppm 2
0.3 150 ppm 192 ppm 210 ppm 3
0.4 200 ppm 256 ppm 280 ppm 4
0.5 250 ppm 320 ppm 350 ppm 5
0.6 300 ppm 384 ppm 420 ppm 6
0.7 350 ppm 448 ppm 490 ppm 7
0.8 400 ppm 512 ppm 560 ppm 8
0.9 450 ppm 576 ppm 630 ppm 9
1.0 500 ppm 640 ppm 700 ppm 10
1.1 550 ppm 704 ppm 770 ppm 11
1.2 600 ppm 768 ppm 840 ppm 12
1.3 650 ppm 832 ppm 910 ppm 13
1.4 700 ppm 896 ppm 980 ppm 14
1.5 750 ppm 960 ppm 1050 ppm 15
1.6 800 ppm 1024 ppm 1120 ppm 16
1.7 850 ppm 1088 ppm 1190 ppm 17
1.8 900 ppm 1152 ppm 1260 ppm 18
1.9 950 ppm 1216 ppm 1330 ppm 19
2.0 1000 ppm 1280 ppm 1400 ppm 20
2.1 1050 ppm 1334 ppm 1470 ppm 21
2.2 1100 ppm 1408 ppm 1540 ppm 22
2.3 1150 ppm 1472 ppm 1610 ppm 23
2.4 1200 ppm 1536 ppm 1680 ppm 24
2.5 1250 ppm 1600 ppm 1750 ppm 25
2.6 1300 ppm 1664 ppm 1820 ppm 26
2.7 1350 ppm 1728 ppm 1890 ppm 27
2.8 1400 ppm 1792 ppm 1960 ppm 28
2.9 1450 ppm 1856 ppm 2030 ppm 29
3.0 1500 ppm 1920 ppm 2100 ppm 30
3.1 1550 ppm 1984 ppm 2170 ppm 31
3.2 1600 ppm 2048 ppm 2240 ppm 32

There are three conversion factors which various manufacturers use for displaying ppm's...

USA 1 ms/cm (EC 1.0 or CF 10) = 500 ppm
European 1 ms/cm (EC 1.0 or CF 10) = 640 ppm
Australian 1 ms/cm (EC 1.0 or CF 10) = 700 ppm

For example,

Hanna, Milwaukee 1 ms/cm (EC 1.0 or CF 10) = 500 ppm
Eutech 1 ms/cm (EC 1.0 or CF 10) = 640 ppm
Truncheon 1 ms/cm (EC 1.0 or CF 10) = 700 ppm

Water

Yes, water does play a huge role when you are trying to grow healthy plants not only does our plants need water, but there are many different kinds of water to use, there is bottled water, Tap water, Reverse Osmosis water (RO) and Distilled.
Out of all these different kinds of water, there’s one thing you want to make absolutely sure of and that is making sure any kinds of these water’s do NOT have sodium in them.
Sodium will completely lock out any nutrients you have given your plants single handedly. Sodium is the first thing plants take in when taking in nutrients and when this happens, a build up of salts will happen and lock out nutrients in your soil/hydro setup. The salts stay built up in the soil. Using water that has sodium, like from bottled water or tap water, or from a water softener is what you want to stay away from. If your home has a water softener, then you must either buy bottled water, either from a fill station, or make a bypass valve before the pipe gets to the water softener. Plants suffering from sodium toxicity show a vast amount of problems, depending on how resilient your plant strains are, and how healthy your plants are, plays a great deal in the final outcome. When the plants are young is when they are the most affected, under 3 weeks of age is when the damage can really be done. Sodium causes stunting droopiness and most of the time, nitrogen, magnesium and calcium are the nutrients to be locked out first, twisting and discoloration on the leaves, mostly lower to middle is where it starts. They will always have a droopy look to them even when your soil is kind of dry; the leaves never stay perky when there is too much sodium in the system (Soil/Hydro). Sometimes your plants will not recover and they will not grow, usually it’s the younger plants less than 3 weeks of age. In order to fix this problem, it’s simple you need to flush your soil out with a lot of clean sodium free water.
Flush with as much clean water as you can 2 x the amount to the size of your pot. So if you have a 2 gallon size pot; use 4 gallons of water to flush it out. If you have hydro system flush out your system with clean water, let it sit for about 15 min. and then flush it out and put more clean water in and apply your nutrients, or whatever you had in your setup.

Hard water

Hard water causes nutrients to not be absorbed properly in your plants, in order to find out if you have hard water you can by test strips from a pool store or hardware store, strips will tell you ph, hard water and other things that may be in your water.
Anything over 200 is considered hard water, but it’s the higher numbers like 350 and higher is what you want to be alerted about. If you do have hard water you may want to consider installing a reverse osmosis system. Reverses osmosis system cleans the water, but also removes calcium and magnesium from the water. High levels of calcium and magnesium is what contributes to hard water. If you choose to use a reverse osmosis, you will need to supplement your plants with a little more calcium and magnesium.

Hermaphrodite Pollination

Yes, your female plants can turn into males! The factor is strain induced and or your growing environment conditions. What some seed companies wont tell you when you are growing there feminized strains are; that in order to achieve 100% female success rate, you have to be growing in prime conditions, that is with humidity, you can not add to much water, nutrients, light and such. Feminized seeds are not the only kind that turn into male and female, ANY strain and any plant can turn into a hermaphrodite. If your plants keep turning into hermaphrodites, there are some things you can do; first you need to see if the strain you are growing is prone to turning hermaphrodite. If you are not growing a strain you know about, say you are growing bag seed; you do not know anything about what kind it is, so the best thing to do is not grow it and get some different beans. Next thing you need to do is make sure your growing conditions are good, fresh air, proper nutrients, not to high not to low, your plants have enough light, and making sure your flowering room does not have any light leaks. Light Leaks can cause the plants to become hermaphrodites. Cannabis plants can see the tiniest amount of light, so making absolutely sure your flowering room has no light leaks is also a factor. If your plants have turned into hermaphrodites and pollinated your plants, there is nothing you can do about it, those beans the plant produces will carry the hermaphrodite trait and if you grow them out you may be right back to where you are. You can in fact grow female plants from hermaphrodite seeds, but they are going to be very unstable.
What you want to make sure though is, when you put your other plants into flowering, you want to make absolutely sure your room is washed down and everything that was in the room be washed down as well, growing equipment, hoses, nutrient bottles, pots, everything. You don’t want pollen that stayed behind to pollinate your girls this time around. Washing down everything with watered down bleach or soap will prevent old pollen left on walls and equipment from re-pollinating your plants.

12-27-2006, 08:25 AM	#8
10k burnt out og'er   Join Date: Feb 2006 Location: cyber space Posts: 1,848	This is an excellent compilation of sick plant information MynameStitch

For the sake of making this guide easier to follow...
All readers please post any comments, questions or contributions for MynameStitch to the following thread.

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08-04-2007, 11:10 AM	#9
10k burnt out og'er   Join Date: Feb 2006 Location: cyber space Posts: 1,848	Temporarily unlocked for mynamestitch edits, ammendments, corrections.

Any member posts added to this thread WILL be deleted...
So please follow the above link for further discussions, comments and contributions.

tia,
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07-14-2010, 04:53 PM	#10
Justa6655321 Senior Member     Join Date: Nov 2008 Posts: 1,313	Just want to bump this so it will get more attention.... __________________ Fear leads to anger; anger leads to hate; hate leads to suffering.
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07-16-2010, 01:26 AM

#11

MynameStitch Dr. Doolittle     Join Date: Mar 2004 Location: Wildlife Prairie Park Posts: 4,821

Part 3 Plant Diseases/Infections Stem Canker (Stem Rot) Stem cankers are what the name is, they form on stems from a fungus similar to white and yellow leaf spot. Weather can affect the way stem cankers can live; wet humid weather is what makes this fungus thrive. Canker fungus is caused and entered the same white and leaf spot fungus enters the plants, it enters through an open cut, wound, pruned wound, or pest infestation that has caused damage by eating leaves or chewing on the stem’s or stalks and can be transferred through rain. It can also get in through susceptible plants that have been wounded through environmental factors like animal attacks, pruning, LST (Low Stress Training), and using cutting utensils that are not sanitary that may have fungus or bacteria on them. Damage to the plant occurs in the form of a yellowish-brown discoloration on the lower portion of the stalk. Later, the leaves turn yellow and fall off, and the plant dries out and dies.They form mostly on the stems, but severe cases spotting starts to form on the leaves from internal tissue being cut of nutrients and water. In between nodes is where stem cankers start to form, and move up the plant, around the 3rd, 4th and 5th node is where it will mainly affects the plants. Stems will have brown lesions; eventually have a dark reddish-brown sunken canker in the stem. Sometimes if severe the wound may reopen and appear split in the middle of the area of the wound on the stem and can also create a buldge. The lesions can extend up the plant over 3 or 4 nodes, once this happens the plant starts to wilt from vascular uptake being cut. This gets confused with root rot when the plant starts to wilt, and leaves turn yellowish brown and or spots, because the stem canker does not show itself yet once this starts to happen. Once the stem canker has been observed and if not treated, the leaves will start to wilt with yellow, white and brown spots, similar to white and yellow leaf spot. When plants are affected by this, the plant is more susceptible to more fungus and viral infections, from air borne spores.

Prevent and Control

Preventing stem cankers is about the same way other fungus problems, making sure you treat wounds to your plant with H202, making sure your plants are free of pest’s and if you use tools to LST (low stress training) your plants pruning, and training, make sure all tools are sterilized before and after using them. Spraying your plant with fungicides in the months or times this fungus spreads. It’s very important that you catch this fungus before it gets to bad, once the damage has been done to the plant; the only way to get rid of this is to chop the plant down and treat the area that has been infected. Planting other plants near and or around this area can and will re-affect other plants when a new season starts.
Once your plant does have this, using fungicides until it is gone is crucial; if the canker has worsened foliar feeding is a must to help keep the plants vigor, strength and stamina in fighting the fungus. Stem cankers take over by slowly reducing the plants uptake and thus takes over the susceptibility of the plant and the fungus then takes over and worsens more quickly. Using anyone of these products will help control or eliminate stem cankers. (If the plant is to bad, nothing can save it and the plant must be cut down and tools sanitized to stop the spread of the fungus.) (Note: When using chemical and or organic control methods, do not spray the buds, and for health and safety reasons, stay away from spraying around the buds if all possible.)

Physan 20
TR-11000 Pyrethrum
Garden Disease Control
Multi Purpose Fungicide
Top Spin

Safer's Garden Fungicide
Concern Copper Soap Fungicide
Guardian Angel
Serenade Garden Disease Control OMRI
Safer 3-in1 Garden Spray OMRI
Sulfur Vaporizer
Organocide
SM-90
Any fungicide containing lime sulphur
Concern Copper Soap Fungicide

Fusarium Wilt

The United States released this fungus in an area; it later had devastating effects on cannabis plants even after winter had passed it stayed in the soil. Seedlings that were planted were killed several years after the fungus was released. This fungus can be air borne and transmitted like other fungus and pathogens, it gets in through susceptible plants that have been wounded through environmental factors like animal attacks, pruning, LST (Low Stress Training), pest infestation and using cutting utensils that are not sanitary that may have fungus or bacteria on them. Fusarium wilt causes internal damage to vascular lines inside the plant and blocks the plants ability to carry water and nutrients. Symptoms included wilting of the plant, leaves becoming necrotic and yellowing wilting of the leaves while the yellowing leaves may look like a nutrient deficiency, this is clearly a mask, with Fusarium wilt, leaves will yellow and stay on the plant, where with a nitrogen deficiency the leaves will yellow and fall off. While not affecting the roots, it does affect inside the plant cell walls, inside the plants walls will reveal a red brown color inside the tissue. Stems will change color from normal green and purple hue, to a dark purple to blackish color. This pathogen can get confused with root rot, because the symptoms this pathogen shows are nearly the same as root rot, but roots are not affected. This clogging effect inside is what causes the external symptoms. While this fungus is traveling inside the plant, the toxins spread to uninfected areas and causing the clogging effect internally, these toxins is what causes the other un infected tissue to start to show the 2ndary problems, which are slow wilting of the leaves, stem collapse, stem discoloration and overall droopiness (as if the plant is dry and had no water) to parts of the plant, even if they get plenty of water. This fungus is a real killer to cannabis plants, any remaining plants that are survived can be stunted. Fusarium Wilt thrives in warm moist temperatures, which is why southern states have Fusarium Wilt the worst.

Prevent and Control

Fusarium Wilt is by far one of the hardest things for cannabis to overcome, if it ever does overcome it. Your plant health, environment and strain have a lot to do with weather or not Fusarium wilt will take over your plants. This pathogen mainly affects cannabis and hemp family, but can affect other plants but does not show the damaging effect it has on cannabis, like it does on other kinds of plants. This pathogen was breed specifically to attack wild cannabis plants and growers who grow there plants outdoors’. There is no form of organic control for this type, reason for this is, because the fungus is so strong and not susceptible to much of anything unless you get it right when it starts, if you do not get it in time, it thrives in the plants and consumes and kills the plants. There is only a few ways to control this fungus, one is to fumigate the area you are growing in killing the pathogen in the soil while it is dormant, so when you grow in this area again, your plants are much less likely to get it, the only other way your plants could get this if not from the soil, is from airborne spores get in through open wounds on your plants leaves, stems and stalks. Plants that produced seeds when it was infected with Fusarium wilt should not be used, as the pathogen stays dormant on the seed and attacks it when the seedling emerges and causing the “damping off” effect and thus killing the seedling before it even has a chance to grow it’s real first set of leaves. Acidic soil helps boost Fusarium wilt. Stay away from acidic soils .Counteract this by using dolomite lime, or green sand Using potassium and calcium enriched organic nutrients can help fight off and prevent Fusarium wilt, excessive amounts of nitrogen, phosphorus can speed up Fusarium wilt.

If your plant gets this it will surely die, the only thing you can do is try to reduce the destruction by foliar feeding areas that are not infected, cut off infected areas discard them away from your growing areas and treat the wound with h202 (Hydrogen Peroxide).
Making sure you clean your tools afterwards is important. Treating with fungicides will not work in controlling this.

Pictures below show Fusarium Wilt infection.
(Photo Credit: Hort)

Powdery Mildew

Mildew spores can be brought into the grow room through air ventilation into your grow room, your cloths, pets and be carried by animals outdoors. and land on the plant infecting other parts of the plant, buds, stems, stalks and leaves, also spores can land on indoor grow room walls, tubes, growing equipment, hoods, ballast’s, cords and etc. Spores can remain dormant until environment factors trigger it, like high humidity and cool temperatures, poor air circulation. Powdery mildew in vegetative growth is much easier to rid than in the later stages of flowering. Night time temperatures and moisture triggers spores to be released. The mildew eventually covers and coats the plant thus reducing the process of photosynthesis. If left untreated powdery mildew will infect all plants in your garden and coat your plants in flour like substance and cause leaves to “suffocate” Yellow and die off. If your plants are in flowering, depending how far into flowering, your buds will eventually become infected and will not be able to be used. Buds will have a stale moist smell and will be coated with a white powdery substance that can’t be removed no matter what you do. Very early detection in flowering plants that have powdery mildew is extremely important, the longer you wait in flowering the more impossible it gets to eradicate this, due to this, bud size gets bigger in flowering and having high humidity temperatures over 65% can trigger active spores to start, not only powdery mildew, but triggers other problems from it, like bud rot. Not only will you have lower yield, but you won’t have any buds, due to the fact mold has crippled your harvest.
Strains vary in susceptibility to molds, just like other pathogens and nutrient requirements and care.

Prevent and Control

Symptoms of your plants having powdery mildew include: white blotches of furry stuff and white spots or splotches that you can wipe off, having humidity that is over 65%, also starts on darker areas of the plant and spreads to the top. Darker areas on your plant that do not get a lot of light will start to show this first, then when spores become active it spreads to everything. The longer you let it go the harder it will be to eradicate, late flowering plants that have this are extremely hard to get rid of, due to bud density thicker in late flowering plants, because of this the mildew attacks the buds which you can’t cure mildew once it affects the buds.(also known as Bud Rot)Plants that are stressed from environment factors, or fighting pest’s will be taken over more by this mold, due to the fact it’s already fighting problems. If you see your stressed plants getting it first, try to isolate the plant and bring down humidity, better air ventilation and or negative air pressure grow room. If you have mildew with your fans running, you will need to take them down and clean them as the fans can spread spores around the room. You will need to wash down everything in your indoor grow room, spores land on everything, so everything needs to be washed with mild hot water and bleach solution. Removing infected leaves from the grow room is critical, carefully removing them and trying to not knock spores into the air is a challenge. Applying a bag over infected leaves and tying it shut then removing it helps out with not knocking up spores in the air. Making sure you use h202 on stems that have open wounds from leaves that was removed. DO NOT water when lights are going to be going out, doing this keeps water on the plants soil and causes higher humidity levels, this goes for foliar feeding. Water plants when lights first come on or there is at least 5 hours left of lights on. You want to reduce the amount of humidity as possible if your levels of RH are high, you want to keep your humidity levels around 40 to 50%, and anything over 60% is going to trigger problems. Also keeping plants spaced apart allowing maximum air flow in between plants will help minimize plant to plant infection. Using a dehumidifier can greatly reduce humidity issues. Using a meter that tells your grow room conditions like temperature, RH and time can help combat your problems, by keeping track before and after you water can tell you how much if any your humidity can rise after changes made to the grow room. Sulphur Burner is another way to prevent and kill powdery mildew by vaporizing spores in the air. (Do not apply sulfur when air temperature is near or over 90°F) Controlling your mildew outdoors can be somewhat of a challenge, you can’t control outdoor temperatures, or environmental factors, Using Vapor Gard,Wilt Pruf sprayed over the leaves can prevent infection’s.
You will need to treat your plants with various organic and chemical controls. This list will work for indoor and outdoor growers in killing and preventing Powdery Mildew. Outdoor growers can use Organics List below to help prevent Powdery Mildew of starting, even after it has started using anything below will help kill it off. (Note: When using chemical and or organic control methods, do not spray the buds, and for health and safety reasons, stay away from spraying around the buds if all possible.)

AQ10
Serenade
Plant Shield
Garden Disease Control
Fungicide containing Lime, Sulphur

JMS Stylet Oil
Saf-T-Side Spray Oil
Sunspray Ultra-Fine Spray Oil
Neem Oil
Neem 2
Kaligreen
Safer Garden Fungicide
Concern Copper Soap Fungicide
Guardian Angel
Serenade Garden Disease Control OMRI
Safer 3-in1 Garden Spray OMRI
Sulfur Vaporizer
Organocide
SM-90
Malatox
Garden Sulphur
Sulphur Burner
Sodium Bicarbonate
Chi
Mother Nature's Karanja Oil
Concern Copper Soap Fungicide

Picture below shows Powdery Mildew
(Photo Credit: Beach Stoned)

Damping-Off

Damping-Off is a fungus that is in soil mixtures, it attacks seeds and seedlings before and after it emerges from the shell. Seedlings that get attacked by this fungus usually die, considering the plant doesn’t have a fighting chance nor a system setup to help fight the fungus. A range of growth stages the plant can be attacked, up to 8 sets of true leaves, or 3 leaf nodes. Leaves, roots, and stems can be affected. Damping-off can be easily confused by excessive fertilization (Nutrient Burn), high levels of salts from either water or nutrient solution build up, excessive heat or cold, excessive or insufficient soil moisture. The Cotyledons show on the soil surface can whither and die or healthy looking seedlings may suddenly fall over. Infection first starts right below the soil line; once attacked, the seedling and vegetative stage plants will start to rot, lower part of the stem will be soft, brown and or leaves will turn purplish hue and can yellow, brown and then fall over or shrivel up; can be any one of these or show all symptoms. Seedlings, or vegetative stage plants then can start to fall over from stem being so soft and starting to rot inside out, one item contributes to this problem is over watering, putting seedlings, or small plants into a big pot; when you water the soil down lower soaks up excess water and ends up sitting in the middle to bottom part of the soil in the pot. When this happens fungus begins to build up due to them not having a deep enough or a big root system to absorb all the excess water, then it ends up turning into damping-off. Later stages of damping-off in vegetative stage seedling, the leaves will droop and turn yellow, as if the plant was over watered. Stems will be severely weaken and may fall over from being under developed and skinny. Older plants can build up a resistance to damping-off, but if they do not, older plants show long skinny stems, stunted roots, and stem discoloration. The Soil that is rich in nitrogen, r rich mixture, and soggy soils, soil that stay wet for long periods, and warm soil or temperatures. Even hydroponics systems can get damping-off; mediums that stay too saturated, you have less likely chance of getting damping-off in hydroponics systems.

Prevent and Control

In order to help control damping off or preventing it you should try to start seedlings in “starter cups”, drinking cups you get from the store; putting drainage holes in the bottom of the cups is extremely important in helping avoid damping-off, allowing excessive water drain so the bottom half of the mixture will not stay wet.
This is why cups are great for starter seedlings, you can still over water, but your chances of getting damping off are much less than that of a seedling put into a big pot with lots of soil. Making sure you have holes and a good amount of perlite in your mixture helps greatly, I always recommend cups having drainage holes. Putting seeds into the soil at a low depth helps out, just putting it an inch or 2 at the most helps avoid the fungus.
Avoid starting planting in rich soil mixtures, not only can you burn them when they emerge out of the soil, but too much nitrogen can lack root growth and aggravate damping-off. Try using a seed starter mixture, not watering heavily, and avoid watering everyday, seedlings in cups should only be watered a bit every 2 days, seedlings with 2 to 3 sets of leaves in cups can start to be watered more heavily where water starts to drip out the drainage holes, only then you should water like this every 3 days. Over watering is one of the biggest causes of
damping-off. Also using soiless-mixtures like peat growing mixed with other stuff can help deterrent it. If you decide to get mostly soil with peat moss, you must make sure there is dolomite lime added to adjust the p H, otherwise you will have ph issues that can lead to locking out nutrients that are in the soil, but not able to be absorbed because the ph is off. Using sterile soil helps greatly, Allow great air flow and circulation in your grow room, allow the surface to dry before watering again, using moisture meters, or sticking your finger down in the soil near the edge of the pot to test for wetness down in the soil. Testing the soil near the edge of the pot helps to avoid bothering root development.
Once Seedlings that have already emerged from there seed shell and end up getting affected by damping off has a very high chance they will not survive and there is nothing you can do about it, by the time it shows in seedlings, it will already be to far gone. Using a fungicide on the seed before putting it into soil mixtures helps to avoid post emerge damping-off. Vegetative stage plants with a few sets of leaves has a better chance of fighting it off, using a fungicide can help depending on how far along the fungus has spread. Using any of these products below can help avoid or kill damping-off. (If using on seedlings or seeds, use organic based fungicides.) Chemical control should only be used on older plants, not seedlings.

Physan 20
Garden Disease Control
Multi Purpose Fungicide
Top Spin
Captan
Thiram
Apron

Safer's Garden Fungicide
Concern Copper Soap Fungicide
Guardian Angel
Serenade Garden Disease Control OMRI
Safer 3-in1 Garden Spray OMRI
Organocide
SM-90

Root Rot
What causes root rot? Low Oxygen levels. (DO) Desolved Oxigen. Temp's are the main reason for root rot, Low temps will lower the DO levels and high temps will cause low DO levels. Keeping temps between 65 to 72 will allow MAX DO levels or max o2 for roots. (Thank you so much for the information syko2! has provided above!)
Over watering also causes root rot, Root Rot infects parts of the roots, which then spread infecting the whole roots causing death, Root Rot can be caused by to high of temps in hydro as well as over watering. Not enough drainage in your soil can cause Root Rot, even signs of it looking over watered, because the soil holds moisture to long for the roots to dry out. So these 3 things are all connected together. The main one that causes everything is over watering. Once you find out you have root rot, depending on how bad the problem is, you can add H202( Hydrogen Peroxide) with your water or hydro setup to kill the bacteria caused from root rot. If the plant is severely taken over by it, there are only a few things you can do, cut off the roots affected by it depending on if its hair roots or tap roots, use H202 mixed with water in a different bucket and use it for a dip to help kill off bacteria before putting it back in the system, also note the system needs to be cleaned out if you have root rot.... using products like sm90 will kill off the root rot, using h202 in your system does more harm than good, it kills off the bad bacteria and good thus creating a worse off problem after the h202 has been overran, h202 if used in a hydro/aero system must be replaced everyday due to it disapating from the air. After it disaptes the plants defensive system has been killed off by the h202 causing the root rot that was not killed by the h202 left and thus overruns the plants root system. So again h202 should never be used in the hydro system, be kept in the system, although it is safe to use to rid of algae growth in rockwool and other mediums, but never be used in with the root zones regularly. Sm90 is a good product you can use to kill off root rot. Hydroguard helps protect and there are many other products that work as well, hydroguard is one of the more popular ones that work.

To prevent Root Rot, adding product's like Thrive Alive B-1, See Weed, Super thrive will help protect your plant's from root rot and will help cure root problems. ( Again ty so much for giving me the info syko2!!!)

Here is what root rot looks like: 4eBig thanks goes out to buzz, diggerdigzit and Shop Vac! Thanks for the pics guys! :tup:
First pic is of to high temps in the bubbler: Last 2 pics came from chemical burn root rot first pic, moldy rock wool with root rot.

(Picture Provided by Buzz)

(Pictures 2 and 3 Provided by Chemical Burn)

(Picture 4 was contributed by Diggerdigzit)

Bud Rot

During the last week or two of flowering, depending on if you use chemical or organics. If you use chemical, you want to flush 1 ½ weeks to 2 weeks before harvest to flush out all of the chemical nutrients that your plant was using. If you are using Organics then you would want to flush about a week before harvest. Giving them plain water is fine, flushing them also improves the overall quality of your bud. Once you start to 'flush' you should check extra careful for bud rot. Bud Rot Happens when the humidity is high, if you have fat dense buds, or if mold spores are in the air. Bud rot looks like a black brownish sludge that can quickly take over your plant and ruin your harvest. The mold spores are air-borne.

Prevent and Control

Removing any dead or dying material from the plant helps prevent bud rot so does decreasing humidity and increasing ventilation. There are also safe anti fungal sprays from hydro shops that help. If you do find gray mould, cut off the infected part of the plant well above and below the effected area and remove it from the grow room. Decreasing the humidity from 55% to around 40% will make a big difference in preventing bud mold. Also having very big buds can cause bud rot, and would advise watching the areas on your plant that have the biggest, thickest and the more dense buds. Try to have medium size buds rather than having big thick buds. Having a dehumidify around when high humidity days can help as well.

To protect them against bud rot for outside. DO NOT foliar spary at night, doing this the heat will not evaporate the water as well because it is night.
Water the plants in the day instead of so close to being night. Same as foliar spraying.

Make sure your plants are stress free as possible and checking plants often can aid in getting rid of moldy bud before the spores spread onto other areas of the plant! Have a lot of air going around the plants for bad ventilation= sick plants and a breeding ground for spores!

Keep leaves away from soil making sure they do NOT touch the soil.

Keep cooler temps at night while plants are on there down time.

If you have gotten bud rot already the best thing to do is cut off the bad buds discard them away from you’re grow and apply any of the following: Neem oil, Neem2 which is a ready made solution!
Using high ph water for foliar spray prevents them from spreading as well kills the mold. pythium is another good product to use! There are many other chemicals and organics that work, but these are the most popular and they work very very well!

Fungus

Fungus is another problem when you are in flowering, because they are susceptible to a fungus or bud rot. Growing conditions for fungus are best when temps are between 60 and 80 degrees and the humidity is high. The fungus is very destructive and spreads quickly. These kinds of fungus are air borne and can travel to other bud sites. If you already have been infected by them the best thing you can do is cut off and remove the infected area and then discard out of the grow area, then get a hold of some anti-fungal spray and apply.

Fungi can kill your crop quick, so invest in some SAFE fungicide and spray down the plants as much as you can and as soon as you can. The faster the safer.. If you have had problems with fungus before, do NOT spray them you will contribute to the fungus becoming resistant to the spray/chemicals you are using. Try to keep the humidity down to the range fungus do not grow to well in. Keep a good amount of ventilation around your grow, and if you have plants outside, always keep them quarantined away you’re your indoor plants until you know they are safe.

Most fungicides are very nasty and eating them can be very dangerous so its best to use something on them that is safe on plants that you can eat., Safer makes a very safe product that can be found in most stores and hydro shops. it contains only sulfur in solution. Here is a picture of what bud rot looks like when it starts to form.

Control
To control to prevent fungus from forming there are a few things you should do.

DO NOT foliar feed at night, tends to make humidity higher rather than when you water in the day the water has time to evaporate where at night will linger in the air.

Same goes for watering plants at night, wait till the morning or afternoon to water!

Keep a happy plant and will not become prone to infections. Checking plants often can aid in getting rid of any fungus that may attack other leaves and or bud!

Have a lot of air going around the plants for bad ventilation= sick plants and a breeding ground for spores!

Keep leaves away from soil making sure they do NOT touch the soil.

Keep cooler temps at night while plants are on there down time.

If you have already gotten some kind of fungus there are things you can use: neem2, neem oil works wonders!! Potassium Bicarbonate, Baking soda and for other chemical agents you can use Plant Shield, Serenade and pythium! There are many other chemicals and organics that work but these are the most popular and they work very very well!

BIG THANKS goes out to Bud63 for letting me use the pics!! :tup:

found this thought people could use it :)

Thanks for the info. I HATE SPIDER MITES!

If I were to put the garlic in the soil to keep the thrips away, would that cause the bud to taste like garlic?

i dont know but if it was between garlic or me loseing my harvest i think the garlic would win :) but id olny do it if there was a issue. and no i wouldn't think so, and if it did i wouldn't think it be that bad, if at all.

Alright, I was just curious because I see that I have an issue. I put garlic on it last night, hoping that it would solve the problem. I think I might go get some of that neem oil just to be safe. That wouldn't harm my plant would it, even if it is in flowering state?

neem oil works great you have to make sure tho you dont make your plants to oily, also what you can also do is get a comen lantern, and turn off evenything in your room and run it in your room sealed, make sure its a propane lantern, the carben manoxide can kill spider mites as well, but if you use the neem oil, and the latern, it should kill them off, then in a few days spary them down with pure water, to clean them off, and then rinse and repaet the lantern and this should help a ton, a few friends have used this and say it works great, just becarefull on oiling the plants to much and you should be fine.

I add a little bit of hand soap to a spray bottle filled with water and mist my plants 2-3 times a day until they're gone.  It works everytime.

sabbgy:

I am kind of puzzled by your post.  It would seem to me that you are stating that you have had the problem more than once.  If it works (everytime), are they really gone to begin with?  Or, are they hiding or rehatching.  In either case I don't think that hand soap alone will ever end the problem for good for anybody.  You need to address more than just the mites you can see.  How much time elapses between infestation?  The amount of time in between is usually a good indicator of a continuing infestation or a new one.

I have seen the 3 step cure 1> Monterry Spray, 2>Mosquito Dunks in the H20, and 3>tanle trap or gnat strips in the soil, work for five people I know.  All five had success and have not had a problem since.

Personnaly I always have mosquito dunks in my water and I always start each plant with a new stcky trap.  And I have never had a problem with any pest so far.  It is much better to prevent than to try and cure.

. If you want to get rid of mites on the cheap I found a tablespoon of Pomalive dish soap or Safers Soap in 5 gallon bucket of water. Take the plant and dunk it in the water solution a few times. then shake the plant dry. I usually wrap the dirt,root ball with newspaper to prevent the eggs from falling into the dirt. You may have to wipe the underside of the leavesFinally, keep an eye on the underside with a magnafier glass to see if the mites are gone and staying gone. An easier method is pyeuerthium although how safe it is is a question, Preditor mites are safe,effective, and easy but pricy.

I've only ever had spider mites in my clone box.  The peet pods are use for my cuttings I keep outside unprotected.  So when I have gotten them it was within the first couple of days I've brought out new pods for new clones.  Once I've killed them with the soapy water solution they don't come back.  All the clones that got spider mites before rooting went on to live fruitful lives and the mites never came back or spread elsewhere in the garden.

What about using HotSpot Strips found at Lowe's or Home Depot.  If you keep it up for about 8 hours and then take it down it has worked very successfully for our caregivers.  Would love to hear your thoughts?

Use small amounts of floramite, make sure you're not overusing this you don't want the weed to be tainted with pesticide

We don't use floramite. You might want to read the rest of the posts regarding floramite. It is not approved for food items!

Please read my new blog "the safe way"

So, I've came to the conclusion, that neem oil, does not work well at getting rid of thrips. If you ever need to get rid of them, just use hand soap and water. Works perfect! I can't believe I went out and wasted my money on that crap and it didn't even work!