Has anyone defeated powdery mildew?

SickboyDilligaf

SickboyDilligaf

Well-Known Member
manfredo said:
Nah...mold would wipe off of that surface I believe. It's the spores you can't see that you have to worry about....I cleaned and cleaned, and then used an ozone generator, and still the pm came back.
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Do you only get it in late flower like me or do you get it in veg. I read that over fertilization can do it to but I went half of my normal of my last successful grow so can’t be that. I left for 12 days ( family emergency) left my sister a key. She came a hour befor lights out to water even though I told her that she can’t do that so I really won’t be able to note why it happen this grow because it happen when I was gone.
 
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mpaull

Well-Known Member
beacher said:
Hey all, I've been having ongoing issues with powdery mildew for months now and can't figure out how to stop it.

My basement is old (more like a cellar) with water channels built into it to carry water to the sump hole. As a result there's often small pools of standing water around that I believe are a breeding ground for pm and other bad stuff.

Despite the roughness of the basement temps are humidity are pretty stable. Generally 45-55% humidity and around 72-76f temps. I also installed a cold air return down there so fresh air is constantly brought in and old air moved out.

Since the PM showed up one day I've tried many of the solutions recommended online. Sulfur spray, h2o2 and neem had seemingly no effect.

Potassium bicarbonate (mixed with veg oil and dish soap) worked OK, but the pm would come back in 5-9 days.

Lately I've been making lactobacillus serum and spraying weekly with that. I didn't see ANY pm for a few weeks so I assumed it was working and decided I would just spray it weekly as a preventative, but last night more pm showed up 6 days after spraying.

I'm at my wits end and considering just shutting down at this house. I could have lived with spraying every plant weekly, but every 5 days or less is just going to be too much.

Has anyone here actually defeated powdery mildew? Any suggestions or insight would be greatly appreciated!

Also if there are any good scientific resources on PM eradication that someone could point me to that would be great as well.

Thanks!
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So, I have had a couple of really bad encounters with powdery mildew. I tried several remedies with zero success. Then I stumbled across a product from Safer's called Defender. It is a garden fungicide spray. Stopped it dead in 3 days!!! My brother ran into it in a really bad way, I gave him what I had left. Stopped it in 3 days. I now keep a litre bottle on hand at all times.
 
SickboyDilligaf

SickboyDilligaf

Well-Known Member
mpaull said:
So, I have had a couple of really bad encounters with powdery mildew. I tried several remedies with zero success. Then I stumbled across a product from Safer's called Defender. It is a garden fungicide spray. Stopped it dead in 3 days!!! My brother ran into it in a really bad way, I gave him what I had left. Stopped it in 3 days. I now keep a litre bottle on hand at all times.
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when did you have pm in veg or flower? Did it come back at all ??
 
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mpaull

Well-Known Member
SickboyDilligaf said:
when did you have pm in veg or flower? Did it come back at all ??
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1st 2 times were in veg, The second was about 3 weeks into bud. This stuff stopped it and it did not come back. I am smoking it and so are my wife and daughters. No lasting effects as far as we can tell. It worked for me, so I would recommend it, I know my brother is sold on the stuff.
 
Renfro

Renfro

Well-Known Member
mpaull said:
1st 2 times were in veg, The second was about 3 weeks into bud. This stuff stopped it and it did not come back. I am smoking it and so are my wife and daughters. No lasting effects as far as we can tell. It worked for me, so I would recommend it, I know my brother is sold on the stuff.
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Just a sprayed application of sulfur? That the one?
 
SickboyDilligaf

SickboyDilligaf

Well-Known Member
I just bleached everything. Now I’m gonna put equipment back in with a space heater and put temps up past 100 for 24 hrs. That should kill everything.
 
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mpaull

Well-Known Member
Renfro said:
Just a sprayed application of sulfur? That the one?
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I believe so. I got rid of the spray bottle it came with so I can't be sure. I thought it had a shitty sprayer so I used a different bottle. The shit just clogs the nozzle and has to be flushed. Live and learn.

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Kassiopeija

Kassiopeija

Well-Known Member
SickboyDilligaf said:
Cleaning my tent again. Black dots on floor. Only like 6 and tiny. Won’t come off for nutin!!! Is this mold ?? I’ve seen photos of PM with black dots in it View attachment 4584391View attachment 4584392
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how does it smell?

SickboyDilligaf said:
So I guess this won’t work lol Uv light View attachment 4584403
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Diodes are doubtful
mpaull said:
So, I have had a couple of really bad encounters with powdery mildew. I tried several remedies with zero success. Then I stumbled across a product from Safer's called Defender. It is a garden fungicide spray. Stopped it dead in 3 days!!! My brother ran into it in a really bad way, I gave him what I had left. Stopped it in 3 days. I now keep a litre bottle on hand at all times.
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do you perhaps know the name of the active chemical in it? thx
 
Gond00s

Gond00s

Well-Known Member
I've beat it just takes dedication. removed everything in the room bleached it three times then I hit the room with ozone left in on for a hour and let it be off for the rest of the day seal the room up did this for about 2 weeks got everything set up been like a year since I had to do it haven't seen it since. if using ozone make sure u seal the room up fully biggest thing to do.
 
SickboyDilligaf

SickboyDilligaf

Well-Known Member
I’m about to hand 2 hair dryers in there for heat. How long do you give them lol Let’s have a lottery !!!! I say 75 minutes
 
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mpaull

Well-Known Member
SickboyDilligaf said:
My grows over. My goal is to use something to prevent this next grow. My heater has a safety on it. Won’t go past 89. So much for that.
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I would think the bleach and a good heating and drying should give a good start. But, I am still learning and old enough to be thinking of stopping...in a decade or 2 ;-)
 
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