Jaindohanswered grow question 7 years ago Have not dealt with them myself fortunately but one of the reasons I switched to coir was to further reduce insect problems (outdoors was awful for this).
However, Nebula Haze has you covered:
http://www.growweedeasy.com/cannabis-broad-mites
Lot of people are real fond of neem oil, I always forgot to buy and use it.