I agree on less in more 100%.
Where I'm from (east coast) if I don't have PM I'm about to have it. I know for sure that the PM spores are in, on, under and floating around my plants.
It's everywhere specially in the fall season. That's how the senescence starts in the fall. All the veggie leaves have PM then the tree leaves then every other green plant, then the leaves turn colors if its cold at night, and fall off. A little breeze.... spores are everywhere.
I feel sorry for folks that have allergies to mold. yikes.
Yeah so my point is, starting with the spring, summer and fall run, I'm using Horsetail fern tea to treat plants for PM/mold spores starting in VEG and usually bud wash with H2o2 as the first washing then I follow Doc's recipe. When we have dew points same temps as air, there's going to be mold. May not see it but it's likely there.
I don't know how the H2o2 thing got into the bud wash thread but it's not a bad thing if you grow in humid conditions like east coast and PACNW... Michigan and Canada as well. Anywhere where the dew point and temps meet at night causes the RH = 100% everything covered with moisture.