Powdery mildew?

I cut the most affected leaves and improved air circulation. I do not have humidity control. 5-6th week of flowering

What else can I do?

Fungicide

Baking soda and dishwashing soap sprayed on

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Citric acid spray
spray Potassium Bicarbonate
spray Hydrogen Peroxide.
Regalia

Be ready for a post harvest bath

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20 to 1 20 parts water and one part milk will kill powdery mildew fast

Increasing air flow will blow the spores around more.

Not saying the three reply's above mine are wrong but they never worked for me. Well, they did but temporarily, it always came back.

I've beaten PM for good several years ago and never seen a spec since. Sulfur burner..

If you're in flower, I would chalk it up to a loss. I do not know much about smoking a bud covered in a thin layer of sulfur, but I would advise against it. But run the burner lights out and fans off for several hours every couple days in veg and it will kill all pm spores. It will kill all, in every nook and cranny, on the floor, ceiling, electrical outlet. The vapor will coat everything. Run the exhaust to rid the sulfur after a couple hours of burning. Repeat every 2 to 3 days for a couple weeks.

You could try wettable sulfur.

If you have high humidity, you need to address that while treating the plant. Potassium Bicarbonate or citric acid both work by raising or lowering the PH of the leaf surface far enough to kill the PM. Both are quite cheap, and citric acid can usually be found in well stocked grocery stores, or hardware stores that sell canning supplies. Increase your air circulation and look into a dehumidifier.

Hollatchaboy said:

You could try wettable sulfur.

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Rurumo said:

If you have high humidity, you need to address that while treating the plant. Potassium Bicarbonate or citric acid both work by raising or lowering the PH of the leaf surface far enough to kill the PM. Both are quite cheap, and citric acid can usually be found in well stocked grocery stores, or hardware stores that sell canning supplies. Increase your air circulation and look into a dehumidifier.

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The problem with this, is that PM spores are microscopic and spread easily by a simple gust of air. When an outbreak happens the tiny spores are everywhere in the room. A simple gust of air can circulate them thought the room time after time to re-infect plants. Hence my post, you have to krill them all, not just the infected areas.

OG-KGP said:

The problem with this, is that PM spores are microscopic and spread easily by a simple gust of air. When an outbreak happens the tiny spores are everywhere in the room. A simple gust of air can circulate them thought the room time after time to re-infect plants. Hence my post, you have to krill them all, not just the infected areas.

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There will probably always be spores in the room, but if you create environmental conditions that don't favor PM, you can get it under control. I don't disagree with sulfur, it works well, but a lot of us are growing inside our homes where we don't want to burn sulfur.

Rurumo said:

you can get it under control.

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I get the whole home/closet thing and burning sulfur. I just know there is a big difference between getting it under control vs eliminating it completely. Not debating, just throwing my 2 cents. Coming from someone who tried EVERYTHING I read before. This was the only thing that eliminated it for good. Good luck to the OP.

OG-KGP said:

I get the whole home/closet thing and burning sulfur. I just know there is a big difference between getting it under control vs eliminating it completely. Not debating, just throwing my 2 cents. Coming from someone who tried EVERYTHING I read before. This was the only thing that eliminated it for good. Good luck to the OP.

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would or should work in a small tent, what size was the sulper smoker and in what size tent did you use?

reduce water its no biggy but expect a visit from queen Pythium next.. neem oil for all the hard stuff lol

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If you've got the cash an AirROS system from Sage Industries will put hydrogen trioxide into the air around your garden and kill PM and spores.

Home - AirROS by SAGE Industrial Surface & Air Purifiers (airrosshield.com)

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go go kid said:

would or should work in a small tent, what size was the sulper smoker and in what size tent did you use?

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No tents here brother. I have a couple big rooms. But its all the same in theory, just smaller scale. Just scale down the time of the burn or the frequency.

I don't think the burner has sizes. Here is a link, then you need to fill the cup with sulfur.

OG-KGP said:

No tents here brother. I have a couple big rooms. But its all the same in theory, just smaller scale. Just scale down the time of the burn or the frequency.

I don't think the burner has sizes. Here is a link, then you need to fill the cup with sulfur.

https://hydrobuilder.com/garden-care-pest-control/disease-pest-control/all-pest-control/grow1-greenhouse-sulfur-vaporizer.html?gclid=CjwKCAiAvriMBhAuEiwA8Cs5lUla7NZh97bQzyMDL-7pTRisYvZOOHAXVgqJeYvisao7Gv_SliB4oxoCPBUQAvD_BwE

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yeah ive used it befor on a grow when i was an underling just learning from a cool biker who was kind enough to teach me organic growing

OG-KGP said:

No tents here brother. I have a couple big rooms. But its all the same in theory, just smaller scale. Just scale down the time of the burn or the frequency.

I don't think the burner has sizes. Here is a link, then you need to fill the cup with sulfur.

https://hydrobuilder.com/garden-care-pest-control/disease-pest-control/all-pest-control/grow1-greenhouse-sulfur-vaporizer.html?gclid=CjwKCAiAvriMBhAuEiwA8Cs5lUla7NZh97bQzyMDL-7pTRisYvZOOHAXVgqJeYvisao7Gv_SliB4oxoCPBUQAvD_BwE

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i have green and yellow sulpher for burning, theres some ,well used

I only have one plant and there are no more visible fungus spots. I'm going to try milk, peroxide and soap to see if I can keep it from growing again.

My city is very dry but these days it rained a lot. Ventilation was not enough either. This created a good environment for the fungus.

I had already noticed the leaves a few days ago and since I increased the ventilation they didn't grow anymore. The tent must already be full of spores.

I will try to keep the foliar spray weekly until harvest.

go go kid said:

i have green and yellow sulpher for burning, theres some ,well used

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What is green sulfur?

updating: the milk didn't work very well, I soon noticed new outbreaks of white mildew

I sprayed baking soda (1 tablespoon per liter) with hydrogen peroxide (4 tablespoons per liter) and dish soap (4 tablespoons per liter)

my doubt: after spraying the baking soda I noticed that the pistils became darker. It's normal?

I put the photos of my WW, I would like to know your opinion. I had to anticipate the flowering because of my (deserved) vacation, I still have 4 weeks before travel. I did a lot of shit, I didn't pruning the lower buds, I'm learning.