Powdery Mildew

Mold will not take with proper amounts of calcium in the plants.
Unless you use chelates, the absorption of calcium is limited to what gets drawn up during transpiration.
When temperatures are low, humidity high or in green light transpiration will reduce, and calcium will be at deficient levels to bind with pectin to form a protective layer under the skin.
So, low transpiration in the absence of calcium chelates leaves you exposed to mold. They are not allowed to use antifungals in the Netherlands, this is the method they use to prevent it from taking hold in the first place.

Whoa! ^^^ everyday....I feel like the luckiest grower here

Invisighost said:

Well shit...guess during and after the grow will be doing some major decontaminating of the tent...got it from one of my eggplants that was covered in it..do you think constant sprayings of neem can contain it...I'm about a week and half of flower with no visuals of it

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The PM that affects your eggplant is not the same PM that will infect cannabis plants.

Dr. Who said:

Old space = no PM in over 10 years.

New place. 1 bout and done. No PM since.

Filtering your incoming air is a key step in prevention. I have Zuccini - 20 yards from the grow door. It has the yearly PM starting right now. Been treating it since it started. Stopped and controlled at this point. Horsetail grass tea every week from here out. No problems in the building.

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Are you saying the PM that infects your zucchini can transfer to your MJ plants?

Jimmy Sparkle said:

You are still wrong sorry guy... Prevention is key = no shit
No p.m for years = no shit if you know how to prevent its called exclusion and prevention. If your plant PLANT has it you are not eliminating it from THE PLANT PERIOD. There was no speak of environment if I recall ... Sorry buddy keep growing and continue with your denial

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I got rid of it about 2 years ago and kept all the same strains going. It can be done with eagle 20 and spraying coconut oil around the base of teh walls to catch any spores left behind. Just 2 applications in veg(everything in flower was destroyed) and I've never seen it since. haven't used a preventative in 2 years. And the humidity has been in range of an outbreak.
Also there is mildew on my clover and zucchini and other plants around my house and I walk in from outside and go strait to the room and have had insects come in from outside and never had a problem from them, only from a clone that brought it in in the first place.

Bugeye said:

I do find it curious how a non-systemic mold shows up so often on clones. Has anyone gotten PM on a clone that was submerged in diluted h2o2?

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Budley Doright said:

Well if it is based on science then it would be nice to see that. Also what is your method of prevention? I tend to not grow a strain twice if it develops PM as I have found they seem to be prone to get it every year on my outdoor grows. My zucchini get it every year and I treat it but I am very reluctant to spraying my girls. And yup I throw that shit in the oil bin .

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The scientific part Im referring to is all the brave men and women that sit behind a desk and a microscope that get paid to examine all this on a professional level as they are the ones that stated that it can be physically removed but never eradicated, so I guess Im just repeating the information that is available to me. Ive also sat through many insect and disease seminars , plant biology classes ,greenhouse and greenhouse disease and their treatment/control seminars ect. Ive got a huge background in growing everything from squash to orchids and everything in between and a whole shit ton more of tedious facts about my extensive education that I wont tire you or any one else with. P.m can act systemic yep that time I said systemic but it isnt and since every spore cannot be killed it is never gone and can seem very much so.

Jimmy Sparkle said:

The scientific part Im referring to is all the brave men and women that sit behind a desk and a microscope that get paid to examine all this on a professional level as they are the ones that stated that it can be physically removed but never eradicated, so I guess Im just repeating the information that is available to me. Ive also sat through many insect and disease seminars , plant biology classes ,greenhouse and greenhouse disease and their treatment/control seminars ect. Ive got a huge background in growing everything from squash to orchids and everything in between and a whole shit ton more of tedious facts about my extensive education that I wont tire you or any one else with. P.m can act systemic yep that time I said systemic but it isnt and since every spore cannot be killed it is never gone and can seem very much so.

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You got ripped off in all those seminars and classes if you think PM is systemic and can't be removed. No scientist who studied PM is going to tell you it's systemic and can't be eradicated. I hang out with scientists/professors and they are much more specific on how they describe things. I think something may have been lost in translation.

Norby Grown said:

I got rid of it about 2 years ago and kept all the same strains going. It can be done with eagle 20 and spraying coconut oil around the base of teh walls to catch any spores left behind. Just 2 applications in veg(everything in flower was destroyed) and I've never seen it since. haven't used a preventative in 2 years. And the humidity has been in range of an outbreak.
Also there is mildew on my clover and zucchini and other plants around my house and I walk in from outside and go strait to the room and have had insects come in from outside and never had a problem from them, only from a clone that brought it in in the first place.

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Ive got a massive plum tree 75 feet away from my garage where I grow, this thing is dripping p.m, fuckin aphids falling out of it and everything else and yet never in my grow area. I have had p.m twice and never again as both times were early on in my growing venture and from outsourced clones. The tree is still there but the p.m is gone and has been for years in my grow room I mean.... Just takes a weak plant a spore and perfect timing and its back. Prevention as you stated is the way.

Jimmy Sparkle said:

Ive got a massive plum tree 75 feet away from my garage where I grow, this thing is dripping p.m, fuckin aphids falling out of it and everything else and yet never in my grow area. I have had p.m twice and never again as both times were early on in my growing venture and from outsourced clones. The tree is still there but the p.m is gone and has been for years in my grow room I mean.... Just takes a weak plant a spore and perfect timing and its back. Prevention as you stated is the way.

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What? First, off I didn't say prevention is the way, I said I have NOT used any preventative sprays in over 2 years. If that's what you got from my post I can see that translation of what you heard is the problem in you thinking it's systemic or acts systemic.
Second, you think the PM from your plum tree can infect your MJ plants?

Norby Grown said:

You got ripped off in all those seminars and classes if you think PM is systemic and can't be removed. No scientist who studied PM is going to tell you it's systemic and can't be eradicated. I hang out with scientists/professors and they are much more specific on how they describe things. I think something may have been lost in translation.

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Dude, fuckin read....... the last two guys looked really stupid now you wanna go down the same road? It isnt systemic, it can be washed off and beaten back but on the infected plant it will never go away. That plant will battle p.m until harvest weather you see it or not. Please read before you make assumptions on what Ive learned an presume I am incorrect.

Norby Grown said:

What? First, off I didn't say prevention is the way. Second, you think the PM from your plum tree can infect your MJ plants?

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Ok dude argue with yourself , your last reply is just that, your last reply, maybe you should hang out and LISTEN to your "scientist" friends instead of playing with your belly button.

Jimmy Sparkle said:

Dude, fuckin read....... the last two guys looked really stupid now you wanna go down the same road? It isnt systemic, it can be washed off and beaten back but on the infected plant it will never go away. That plant will battle p.m until harvest weather you see it or not. Please read before you make assumptions on what Ive learned an presume I am incorrect.

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You are wrong. Eagle 20 can kill the whole cell, hyphae and all. I ahve read I'd ask you to do the same cause if you do you'll see the truth and we won't have to debate/argue.

Jimmy Sparkle said:

Ok dude argue with yourself , your last reply is just that, your last reply, maybe you should hang out and LISTEN to your "scientist" friends instead of playing with your belly button.

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Yep you definitely translated something wrong in what you read or heard. I think I understad what your saying is that your plum tree never spread PM to your plants just that spores are still in your garden and it comes back time to time? Use some oil to trap the dust so that it never comes back if you think the spores are still in your grow room.
I do listen to them and that is why I'm calling you out. You are trying to tarnish their name by using them to back the false info you are trying to spread.

Norby Grown said:

You are wrong. Eagle 20 can kill the whole cell, hyphae and all. I ahve read I'd ask you to do the same cause if you do you'll see the truth and we won't have to debate/argue.

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Norby Grown said:

Yep you definitely translated something wrong in what you read or heard. I think I understad what your saying is that your plum tree never spread PM to your plants just that spores are still in your garden and it comes back time to time? Use some oil to trap the dust so that it never comes back if you think the spores are still in your grow room.
I do listen to them and that is why I'm calling you out. You are trying to tarnish their name by using them to back the false info you are trying to spread.

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Ok man look. I do not use any pesticides or fungicides period getting pm is not an option as I Will fucking trash any plant that gets it period. I do not care to treat it but I will prevent it. The tree gets it every year without fail but the grow room doesnt. The fruiting bodies can be washed off making it not visible to your eye but the place where the spore was is damaged and the ?hyphae? God I cant remember what its called off the top of my head ,is still under the leaf subsurface. Even if you do kill it how will you remove the portion that remains? You dont and thats why it can seem systemic but it isnt and you are still smoking mold dude. Mold isnt good to smoke neither are the chems used to keep it knocked back. Stop treating prohylactically and watch what happens.

Jimmy Sparkle said:

Ok man look. I do not use any pesticides or fungicides period getting pm is not an option as I Will fucking trash any plant that gets it period. I do not care to treat it but I will prevent it. The tree gets it every year without fail but the grow room doesnt. The fruiting bodies can be washed off making it not visible to your eye but the place where the spore was is damaged and the ?hyphae? God I cant remember what its called off the top of my head ,is still under the leaf subsurface. Even if you do kill it how will you remove the portion that remains? You dont and thats why it can seem systemic but it isnt and you are still smoking mold dude. Mold isnt good to smoke neither are the chems used to keep it knocked back. Stop treating prohylactically and watch what happens.

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So what are your preventive measures? I've been spraying my plants weekly with neem, but my plants in flower just finished their stretch so I probably won't spray neem anymore. But I am worried about it showing its nasty face agagin.

Jimmy Sparkle said:

Ok man look. I do not use any pesticides or fungicides period getting pm is not an option as I Will fucking trash any plant that gets it period. I do not care to treat it but I will prevent it. The tree gets it every year without fail but the grow room doesnt. The fruiting bodies can be washed off making it not visible to your eye but the place where the spore was is damaged and the ?hyphae? God I cant remember what its called off the top of my head ,is still under the leaf subsurface. Even if you do kill it how will you remove the portion that remains? You dont and thats why it can seem systemic but it isnt and you are still smoking mold dude. Mold isnt good to smoke neither are the chems used to keep it knocked back. Stop treating prohylactically and watch what happens.

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Umm, who cares what you use? Just because you don't use it doesn't mean someone else can't ad get rid of it, whether it be oraganic fungicides and pesticides or not. I said I trashed plants in flower with it and saved plants in veg. The leaves sprayed in veg aren't smoked at the end, they are teh fan leaves. The hyphae left in the fan leaves is of no consequence as to the flowers. And I stopped treating prophylactically 2 years ago and nothing happened.

Systemic means it can travel freely thru the plant, that's what it means. PM can't "act" like it's systemic. There are a # of sprays that can kill the whole organism, hyphae and all.And the chems used to treat PM can be gone from the plant material that you smoke if you use it in veg. If there are no chems left in the plant then you are not smoking any chems.
Listen to what I type and not what you want to hear.

714steadyeddie said:

So what are your preventive measures? I've been spraying my plants weekly with neem, but my plants in flower just finished their stretch so I probably won't spray neem anymore. But I am worried about it showing its nasty face agagin.

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If you killed the hyphae and spray something(oil) to collect any spores blowing around or use UV or hepa filters right then there is no chance of it coming back.

At this point, I find it my obligation as an educated, rational person to inform everybody on this thread that your best course of action at this point is to add Jimmy Sparkle to your ignore list.

It's been quite a long time since I have seen such uneducated, moronic, and in all ways completely wrong information posted by anybody on any topic.

Norby Grown said:

If you killed the hyphae and spray something(oil) to collect any spores blowing around or use UV or hepa filters right then there is no chance of it coming back.

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This is correct. Also, it helps if the oil used is particularly effective at eradicating fungal spores.

I think this is where people get confused

Myclobutanil is the active ingredient in several brands of pesticides, including Eagle 20EW. Myclobutanil works by blocking a key enzyme involved in fungal cell membrane synthesis, leading to abnormal cell growth and eventual death of the fungal pathogen (2) Myclobutanil is a systemic fungicide, meaning it is absorbed at the site of application (ex. leaf) and distributed throughout the rest of the plant, thereby providing more comprehensive protection from fungal infection

(2). As a systemic chemical, myclobutanil cannot be removed by washing treated crops, although residue will decrease in plant tissues over time. The final remaining residue levels vary considerably and are highly dependent on the rate of application, the time of last application before harvest, and how well the specific plant clears the chemical from its system.
http://www.coloradogreenlab.com/blog/eagle-20-and-myclobutanil-in-the-context-of-cannabis-cultivation-and-consumption