Low humidity helps it spread, but I have good news. You can nuke the mildew with some sulfur by mixing 1 tablespoon of elemental sulfur 90%+ with a liter of water. Spray that on your plants and then again 2 weeks later. The mildew will never return. Never use within 30 days of an oil application and never spray in bloom.
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IIRC you can spray them with milk . Don’t sound like somethin’ you’d wanna do indoors , even if you live alone like me…Sorry you’re sufferin’ . I blew coffee all over when I read your earlier post . Well stay warm & dry …it’s duck huntin’ weather down here PNW folks be right at home .
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i thought that was for botrytis. botrytis first infects in high humidity and then if humidity lowers it spreads.
what i understand from PM it infects in a combo of low air circulation and humidity, but once it settles humidity is irrelevant.
i think we’re talking bloom here.
you can spray citric acid (lime juice/water) or milk/water still in bloom and then later rinse with h202 if theres any residue.
citric acid is 99% of dr zymes which many here adore. i like applying both solutions in different days. Citric acid tho has some ppl saying it changes flavor/smell, so i use that for the lower leaves.
you def can. keep milk on the lower end of % to reduce bad smells. something like 30% milk and 70% water.
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This is going to sound… different. It’s because everything you read online about mildew was incorrect. Mildew produces mycotoxins, so don’t remediate and don’t smoke it. I have a list of treatments that will fail to exterminate it and the following are on the list of fail: peroxide, milk, LABS, dr zymes.
Now… for starters, make SURE 100% it’s mildew by using a microscope or magnifying glass… OR ultraviolet radiation, which makes it glow. My mildew knowledge is original research.
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is that original research documented? id love to see it.
citric acid actually changes PH to eliminate PM and it kills mycotoxins - in published research
i will say this tho, if PM is on the bud i would not touch it or try to apply anything- much less smoke it… no matter what. it would go to the bin.
yup, i use milk or citric acid for control really and h202 only as a rinse not as a solution.
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lol, yah it’s completely documented on OG here, but there is lots of yelling. People got upset when I kicked over the apple cart 
I find it better now, for people just to ask me questions and I’ll answer. I would say that 99% of mildew writeups are garbage, even from the dept of agriculture in universities. cough ucdavis cough If you are serious I can send you the pdfs I made from the research.
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Yeah, it was on the lower fans and whatever (which are all gone now, obviously). I cleaned them up real good. We’ll see what happens.
Haha, yeah, the hygrometer works. It’s just super-dry where we live pretty much all the time. Those Santa Anas start blowing in from the east (the desert) and just dry everything out. It doesn’t help, either, that we’re running the heat all the time, too, just because it’s so fucking cold right now.
37% isn’t even nearly as low as it gets in the grow room. I’ll open the tent when the lights turn on sometimes and it’ll be like 25%. Crazy-low. I’ve even left a couple of the big humidifiers on during lights-off and it makes no difference. I only run the carbon filter outtake fans during lights-off; once they start sucking this dry air into the tent, it’s all over, doesn’t matter how many humidifiers I’m running.
Yeah, I saw you mention that on greasy’s thread. Maybe I’ll look into that. It just seems like a hassle… haha.
We’re well past that point haha. There’s significant flower development happening right now, sulfur isn’t an option. I’m gonna look into that wettable sulfur moving forward, though. You can use it kind of as a preventative, right?
The only reason I’m reluctant to use it is because of what I saw greasy mention on his thread yesterday. I know that smell well, it’s fucking gross haha. Growing up in Tampa across the bay from a fucking sulfur mine, yeah, I know that smell haha. But if it works, I’ll use it.
And then just take a hardcore shower afterwards haha…
I’m not suffering haha. I really do think the other plants are gonna straight-up resist the PM. Good genetics and all that…
Nahhhh, I’m not gonna do all that haha. I defoliated like a motherfucker last night, hacked the shit outta that PV #2. If I still see PM later, I’ll just trash that plant (
haha). And maybe all the others, too ( haha).
Still, though… I don’t get it. I grew for years and never had any issues at all. Then two summer’s ago I got aphids. After that, thrips. Now fucking PM? It’s bizarre. What’s the deal with all these issues suddenly showing up? I really don’t understand it…
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I’m positive it was PM, although I didn’t bust out my magnifying glass haha. I just wanted to get the infected leaves outta the house ASAP. But yeah, for sure, if I’m thinking there’s even a slight possibility that flowers are infected, they won’t get smoked.
Don’t you ever, ever question JoeCrowe. He’s the man.
I love him… haha.
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lol im serious. im sending him a pm.
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This is interesting because I remember a very knowledgeable non-cannabis Dahlia grower tell me years ago about the PM issues they dealt with. He pointed out what he felt was a misconception that PM spreads like wildfire as a result of watering plants too late in the day. I remember him detailing his frustration with people attempting to avoid infection by not watering thoroughly, only to get a serious PM infection because they allowed their plants to dry out too much. According to him extension agencies were giving a lot of bad information as well at the time. Doesn’t have much to do with environmental humidity levels but found it interesting and semi-related regardless…
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that is crazy! Is it that way in the rest of your house too? My hands would be so dry and cracked all the time. I can feel it in the winter when my house gets too dry, all the sudden my hands look like I’m 95 years old.
to be clear, the LABs is much much more effective if present from the start, better prevention than treatment for sure.
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omg dahlias were one of the plants in the greenhouse infested with the mildew. When I wiped that shit out, they were cleansed as well. The infestation in the greenhouse was going on for a decade! Ahh now I just kick back and relax. The fucking mildew used to be everywhere in there on the pumpkins too. Thanks for the love @minitiger! In the past people would just pretend I was crazy when I said mildew was easy to kill off.
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Yeah, I don’t doubt that any of that isn’t true.
I feel like I remember, actually, that PM does spread easily in low-humidity environments. It’s been so long since I’ve read anything about it, just because I’ve always been like,”My plants are healthy as shit! No need to worry about it!” haha.
I will say, though, that I was looking at my succulents yesterday (outdoors) and thought I saw some PM on one of them. I didn’t touch it or anything (and even if I did, it’s not like the PM woulda magically appeared on that Pura Vida plant when I opened the tent last night). But it’s still something I noticed.
Maybe I should trash that succulent.
Yeah. You can feel the moisture being sucked out of your skin minute by minute haha. Like, I moisturize like a motherfucker, my hands especially, just because I wash them constantly (yes, I’m OCD haha), but it doesn’t matter. It’s just insanely dry here all the time.
We’ve become the permanent fosters of that dog that we were “babysitting” or whatever (which basically means we’re his owners now; nobody’s gonna adopt a 10-year-old dog who’s special kidney-healthy diet costs $600 a month, on top of all the daily meds he has to take haha). I’ve noticed every time I take him for a walk, he likes to rub himself all over the bushes and plants we walk by. Maybe he brought the PM into the house?
I dunno.
It’s alright, though. Like I said, I really do think the other plants are gonna resist any attempts to be infected. Or whatever haha. And I’m super-fucking-stoked we’re that dog’s Official Fosters now. It’s been a pleasure watching him realize, like,”Oh, okay, I live here now…” haha and getting acclimated. Maybe I’ll just rub him down with those dog wipe things after every walk.
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Always, dude! You’re one of my favorite people here. What you’re doing is admirable as a motherfucker.
I wouldn’t do it… haha.
Fuck them. I take your word as gospel haha!
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For what it’s worth I’ve used Dr zymes to knock out PM before, works well and is “safe to spray in flower” I try to avoid it like most do but have done it when it’s needed on outdoor plants and it’s helped with no perceptible effect to the finished flower, again for whatever that ends up being worth to you
EDUT: hadn’t read Joes post about zymes failing to remediate PM, not my experience but that dude is the truth so I’d follow his advice over mine for sure
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As one of @JoeCrowe 's guinea pigs, I can positively say that the sulfur eliminates PM. I’ve tried pretty much everything from wives tales to Cap’n Jack’s to potassium bicarbonate. Short term control from all that, at best.
Too late for minitiger though, don’t use it in bloom or within 30 days of applying any oils.
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Yeah, I may check that out. Not for this grow, but moving forward. The Dr. Zyme’s can be used as a preventative, right? Like kinda how all that other IPM-type stuff is supposed to work?
That’s another thing that’s odd that I only just now thought of, was that I was giving these plants a weekly neem/aloe/K silicate/peppermint and rosemary essential oil foliar all through veg. You’d think that that would do the trick, but I guess not.
I dunno. Fuck it haha.
I don’t think it is haha. I think everything’s gonna be fine.
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That’s right, o try to use it weekly on a rotation with some dr. Bronners as a preventative. I’ve slacked the last couple weeks though which is a recipe for disaster I know
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The sun came out for a whole 15 minutes yesterday, and about 30 minutes today. It hasn’t rained in two days. Must be some sort of record for this time of year… I can see why the bars are always packed though.
Glad to know I’m not the only one that use the washer/laundry as a prep station… the sink is right there too, so it makes everything easy to clean.
Probably 
Fuck the cold.
Fuck, bummer! You guys are making me want to coat my grow tents and every plant I own in sulfur.
Yeah, fuck PM, I wanna see if you guys are able to get everything under control with the methods above… not gonna lie, PM and all the Hop Latent Viroid stuff having been scaring the shit outta me lately. Good luck and godspeed!
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So true! The last year I lived in Wa. we had 9 months of rain and clouds. It got into the 80’s for one week in August. “But it’s so green!”
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