Way old post, but 2 thumbs up here for JMS stylet oil. I am in the middle of a PM issue that popped up on day 21 of 12/12, so I treated with a 2% JMS/ 1% Serenade and insect soap as a spreader. I did not find PM for 14 days. I had to treat 3 days ago (day 36) with the same mix because I was starting to see it again on a few leaves. I have only seen 1 tiny patch on a leaf since then. So far so good.....unfortunately I am growing a 70 day strain, so I might not get away with only one more spray....it may take 2. We use JMS very effectively in our vineyards on a 10-14 day rotation. As mentioned above, it controls most insect pests like mites, thrips, and whiteflies, and it also controls (kills and prevents) powdery mildew very well. I added the Serenade to my spray mix to help ease my worries about grey mold. Crossing my fingers...