Another fine use for prophylactic neem oil treatment! Light mist, allow to dry, repeat a couple times a week, don't overdo it. Works FANTASTIC on rose bushes too. At Walmart and Home dePOT it's a product called 'fungicide 3'= neem.
stinkyattic Reviewed by stinkyattic on . Preventing Powdery Mildew I have a particular strain of mj that is a Master x Bubba hybrid. It's a really potent strain that I really like. The only problem is, it's highly susceptible to powdery mildew. I have six different strains of mother plants growing together in the mother cab. The MxB will get covered with powdery mildew while all the plants around it have none. I'm a couple weeks into veg on some plants that were cloned from the mother and I noticed yesterday that the leaves have a slightly dull patina to them Rating: 5