A germicidial bulb kills 99.99% of germs, kills mold spores for buds, used it this year.. Chop out the infected area and run it under a uvc light for a quick 5 seconds to kill all the spores to prevent spreading. I disagree with everyone saying to wait for the stem to snap, I always waited for a nice dry crisp on the buds and the stem DOESN"T snap. This year was my first successful grow and i had to cure 10 lbs in jars, everything turned out the same! I used to think curing was tricky, but after having so much bud to cure, its just something you get the feel for.