appeared

Hello all, First timer. I germinated 3 O.G. Kush females (freebies) and 5 regular seeds of a mostly indica hybrid. They're in a 40% perilite, 50% black gold seedling mix, and 10% w. castings (all approx.). They're under a 2', 8 bulb T5. RH in room is 45-55, 40-50 at top of plants. Daytime...

Hi, does anyone have an organic or at least a simple way to combat white mold that has recently appeared on w/ widow leaves? Any help will be much appreciated.