More air flow and lower humidity is always easy thing to do indoors, spread or stake the plant out to let more air flow in between the buds can help also. They make sprays ("Garden Safe 3 in 1 soap" comes to mind) that can be used, claim they can be used up to the day of harvest, but I normally feel trying to not spray and let the plant grow at least a month to help the UV rays and plant material to naturally break anything in the "safe sprays" down... it might be "safe" but who really want's to test that theoryIf anyone has a great way to control it please share