You only get pm when plants don't have a thick enough pectate layer
the mildew cure has canola oil and it works to temporarily wash the leafs off but it will be back in a week or two. neem is a good option but spraying neem on flowering plants will affect the smoking taste negatively. and its funny how people are so into these organic sprays when they aren't that good for you either. sulfur, potassium bicarbonate, neem oil all that stuff on your nugs is bad too.
anyways, myclobutanil is really only dangerous if it accumulates in the soil. so if your drench soaking your plants and it leeches into your soil then it will stick around longer. again i dont mean to clutter up the thread but I've read this same argument on THCfarmr and on this forum too its a very passionate subject but in general its always the same argument, and people on both sides rarely see eye to eye. I'm not just blindly spraying the stuff multiple times a year, i do one spray in veg and thats it. then a few maintenance sprays of sulfur/greencure/neem in early flower, after that nothing. certain clones like cherry pie, cookies, OG all have PM in them. theres no way to get around it if you are growing from clone.
"California accounts for roughly 50% of all myclobutanil use in the US, using 70,000 to 90,000 lbs. annually. Grapes are the most heavily treated crop, using 60% of all myclobutanil in California. Almonds and strawberries are also account for a notable percentage of myclobutanil use in California"
"Degradation is primarily through breakdown by soil microbes, but it will likely leave the site of application by leaching into the soil or with water runoff. If myclobutanil leaches deeply into soil or gets into aquatic sediment (environments without oxygen) it will likely persist for years."
"The octanol/water partition coefficient for myclobutanil indicates that it has a low to moderate attraction to organic solvents - which means it may bind to fish or animal tissue. In metabolism studies, rats quickly absorbed myclobutanil and completely eliminated it within 96 hours with no chemical accumulation in the rat's tissue (Reference 5). The hazard for bioaccumulation of myclobutanil is rated low."
"The EPA considers myclobutanil not likely to be a human carcinogen and there were no signs of neurotoxicity or mutagenicity in long-term toxicity testing. Reproductive and developmental toxicity testing observed fetal toxicity only at doses equal to or above those that caused maternal toxicity. Myclobutanil has not been identified as a potential endocrine disruptor."
you can play golf on E20 treated turf and be low hazard, kids can roll around in e20 treated turf and be considered moderate in hazard. the high hazard zones for e20 are from actually ingesting it at its full strength, or being showered with it for two years straight like the study they did on rats.
i am not condoning its use, of course down the line i would prefer to never have to use it. until i figure out how to make the plant fight it naturally its gonna be used as a preventative in veg. until i see concrete evidence that a e20 spray done 3 months prior to harvesting flowers will leave enough of the toxin in the nugs that it would be considered even a LOW to moderate hazard than i will continue to use it. I've had issues with my own growing partner over this exact subject he was extremely against using it because his garden is 100% organic. Well at the end of the day his nugs have PM damage and mine dont….
I hate to be the barer of bad news, but when I got home I noticed pm on the Bomb Threat and the SFV. Nothing a little einstein oil can't fix, but I think even in healthy plants, PM will thrive in the right conditions.
Indoor plants are never going to be as healthy as outdoor plants. Indoor lamps don't make them produce enough energy to truly be healthy. The sun also has UV , mold and mildews worst enemy
I like using MICRONIZED sulfur