Xtreme Gardening Kryptonite Mite and Mildew Control It's a three-in-one product: it kills mites and their eggs, destroys powdery mildew and it completely evaporates Kryptomite can be used all the way up to harvest, on tender new cuttings and finished product Kryptomite helps shield your plants from oxidation, helping to preserve both the flavor and quality of your harvest