I've been using water, Neem oil and a lil dishsoap as a preventative and cure for fungus gnats, soil mites, and powdery mildew for quite a while now. Its all natural, makes leaves shine, and pests seem to hate the garlicy smell. Can use as a dip, spray or drench (with good drainage). In fact, once I started to use it, all pests vacated never to come back. Regular sprays keep the powdery mildew in check. My bro has used it as well on thrips, to great effect. I will never grow without some Neem oil on hand. Hope this is helpfull to someone.

YukonBikerGuy