How do I get rid of White powdery mildew?

I work for a cannabis cultivation center in Illinois and over the summer we harvested our outdoor grow. About 17,000 plants. About 1/3 of the harvest was contaminated with white powdery mildew and I happened to bring it home with me to my closet grow I've been dealing with it for about 4 months and Everytime I think I get rid of it it comes right back. I have since moved indoors and away from contaminated plants so I am positive I am not continuing to to bring it home with me. We have very strict sanitation routines indoors and the wpm is not an issue inside only in our outdoor grow which is located up the road from the main facility. How can I get rid of this stuff and prevent it from come back? I just harvested and was able to save my crops before it got too bad but don't want it to return. My grow room currently sits empty in preparation for cleaning and sanitizing. Any suggestions? organic or chemical.

Many. Citric acid. Silica foliar. Milk. Baking soda. Among others. Good luck though fighting it outdoors and not taking it inside. Suggest a quarantine area fully lit like everything else is normal. Veg light cycle. 2 weeks. Only take out small cuttings or plants so it's easy to check for development of PM.

Your ventilation system also might not be your friend. Lots of holes to plug.

Sulfur burners can also take care of it. Along with anything else living in the treatment area as far as insects or fungus.

Look into silica which requires use from almost seedling stage on. Pretty ineffective on grown plants. Lots of benefits. I use regularly. Cheap too if you buy online instead of in a shop.

Get a fogger or foamer and blast everything in the room or that will be in the room 360°, wear a respirator and read their Personal Protective Equipment guidance. You're basically dealing with concentrated hydrogen peroxide solution. You don't want it on your skin or in your lungs or eyes.

The product is Hydrogen Peroxide with Peryocytic Acid technology which stabilizes it. Once dry it converts back to water & oxygen, no residues.

This is a prime example of why I won't work at other peoples grows.

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I use Dr Zymes Eliminator as both a post harvest bath and as a foliar spray. It's basically citric acid, works well.

I've used a sulfur vaporizer, works well.

Now I've got an H2O3 generator called an AIRros that works like a sulfur generator but isn't so toxic. It kills powdery mildew in the air and on surfaces.

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Home - Sage Industrial

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One other good preventative is Regalia, as a drench or foliar spray.

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Feed them silica, don't hit the dew point indoors. Outdoors feed them silica from start to finish. Agsil-16h. Feed healthy plants chitosan.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6017927/ sipco makes a product called hyshield, that is chitosan.

Hobbes said:

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I use Dr Zymes Eliminator as both a post harvest bath and as a foliar spray. It's basically citric acid, works well.

I've used a sulfur vaporizer, works well.

Now I've got an H2O3 generator called an AIRros that works like a sulfur generator but isn't so toxic. It kills powdery mildew in the air and on surfaces.

.

Home - Sage Industrial

.

One other good preventative is Regalia, as a drench or foliar spray.

.

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What did you throw for that unit an was that the smallest one they make.

thumper60 said:

What did you throw for that unit an was that the smallest one they make.

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I paid about $3,000 USD.

It is the smallest model they make - I think the # is 4002.

Sage suggested that I run it about 10% power but I didn't see the PM disappear untilI ramped up to 25%, now not even a hint of PM.

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Hobbes said:

I paid about $3,000 USD.

It is the smallest model they make - I think the # is 4002.

Sage suggested that I run it about 10% power but I didn't see the PM disappear untilI ramped up to 25%, now not even a hint of PM.

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Click to expand...

TY bud solid info