Powdery Mildew? What should I do?

[flylowgethigh]

Just snipped off a lower bud of the sativa OHSK, and see this:



Don't want to hurt these, cause that plant is full of them from open pollenation:



I have "green clean" and "pure crop 1" available to spray with.

 

[big315smooth]

my eyesight is shit you think its pm i cant tell. look white but not sure if from the light hitting it

 

[3rd-3yed]

I don't see powdery mildew or anything abnormal buddy, these are just resin glands on a healthy plant.

 

[Crazy Chester]

Hit whatever spots you've found with the green clean - the ones in the photos are small enough that you could take care of it with a dab from a q-tip. That should cause a minimum of damage to the plant and help to prevent it from spreading further to become a bigger problem.

 

[flylowgethigh]

See this flower from the very bottom of that same plant? The one on the left side. Close-up, is that PM?

 

[Three Berries]

Powdery mildew looks like a layer of dust.

 

[flylowgethigh]

Not on the window sill, on the leaves.

Dirt is very possible. I do not (yet) HEPA filter the tent intake air, and when I make butter, the water in the bottom is muddy. Switcher was right about the dirt. My fan blades need washing too. Filter over-covers are way dirty.

I need to get on that intake air box project, cause I think the air is also a vector for the SMs.

 

[Crazy Chester]

See this flower from the very bottom of that same plant? The one on the left side. Close-up, is that PM?

It's a bit blurry - but, no - I don't see powdery mildew on that lower bud. Did you use any OG Biowar on the plant? That leaves a visible film on the plant that can be mistaken as powdery mildew - using a bit too much insecticidal soap can leave a similar film too.

 

[flylowgethigh]

The only thing I spray is a little 'green clean'. Some fan leaves in there had white, but I pull those off as soon as I can.

 

[troutman]

I don't see any PM in those pics.

 

[flylowgethigh]

Well OK then, I am a worry wart. Just cause I had some in the sprayer already, I shot a little green clean in there. Mixed up light ratio, left over from killing SMs.

I wonder if that stuff can dissolve tric heads?

 

[Creeperpark]

I'm the one that's blind and I can see mold big time! On that top bud on the left you have a bad case of mold. High humidity and low airflow are the primary causes of white mold. Planting your vegetation without adequate spacing where it cannot get proper air circulation, or overwatering your garden or potting soil can create prime conditions for white mold to grow.
If overused, fungicides will become less effective against surviving fungi from the previous application and be worthless.

 

[Creeperpark]

In flowering, I cut the water to a bare minimum and only give the plant enough to stay alive. When a plant starts flowering there's a big need for water until the flowers are formed. When the flowers are formed the plant shuts off the need for water and transpires more waiting for pollen. Sometimes only 1000 ml will do the trick for a 5-gallon container during the last phase in flowering. Plus excess water during flowering will prevent resin from being produced. Good luck.

 

[flylowgethigh]

Thanks. I know there is too much humidity in my tents. I have the exhaust fans up pretty high, and have fans inside to circulate. What I need is dryer and cleaner air coming in , which means I need less humidity in the lung room. The other thing I have working against me is the SIP watering, which comes from below. The soil basically stays at the moisture it wants. Then, when I top water in nutes, it gets wetter until the water pressure inside the bag stabilizes.

I feed by top water with 10% of bag volume - 1 gallon water for 10 gallon bags.

 

[zachrockbadenof]

i have had problems with PM, inside and outside- inside i switch up between neem oil and Lost Coast Plant Therapy... i spray in veg and early flowering once or twice a week- i like to stop spraying a week or two after i see buds, tho lost coast says its good up to day of harvest....

i also have some old green cure , which is bicarbonate... i have had it 6-7 yrs, and i don't see them selling it any longer so i hesitate to use it

using neem and lost coast also helps with insects... in my case espec mites-

 

[flylowgethigh]

I was reading Creeperpark bitch in another thread about Purecrop1 about how expensive Purecrop1 is for what it is - but I have some left from a year ago. I am gonna mix up some and spray the remaining AGs, and see what it does. The remains of those plants have some white crap on the leaves, which I believe is from too much moisture. VPD too far to the left of optimum on the curve, screwing up trics, and making white crap.

So I am gonna spray and see. And fix the VPD. And make a fan/filter. Gotta get better at this.

 

[Lester Beans]

In flowering, I cut the water to a bare minimum and only give the plant enough to stay alive. When a plant starts flowering there's a big need for water until the flowers are formed. When the flowers are formed the plant shuts off the need for water and transpires more waiting for pollen. Sometimes only 1000 ml will do the trick for a 5-gallon container during the last phase in flowering. Plus excess water during flowering will prevent resin from being produced. Good luck.

This is information that will help people have poor results.

Plants do not shut off water in flower. That's just nonsense.

A liter is not enough for a healthy flowering plant in 5 gallons. Mine drink 3/4 gallon every other day.

This plant was watered nearly daily and was dry by lights off. No resin?

 

[Lester Beans]

Conditions that favor Powdery Mildew are low humidity and dry plants. It can occur in any conditions if spores are introduced.

Best defense I have found is to spray Grosafe weekly and not let the plants dry out. Grosafe is pricey but works great. I thank Hammerhead for turning me onto that gold.

 

[big315smooth]

seen a pm resistant strain recently dude room was coated with pm except one lush green plant with not a speck on it was really cool to see. i took a clone of it

 

[Creeperpark]

This is information that will help people have poor results.

Plants do not shut off water in flower. That's just nonsense.

A liter is not enough for a healthy flowering plant in 5 gallons. Mine drink 3/4 gallon every other day.

This plant was watered nearly daily and was dry by lights off. No resin?

It depends on the substrate and size of the plants. Your buds look very good and fresh. Coco is watered a few times a day too. Overwatering in the grow room and lack of air movement is often the cause of mold