CO2 supplementation at around 1500 ppm will result in less frequent outbreaks, keeping temp below 80 will help tremendously and combined with humidity above 60% in veg and around 40-45% in flower as the mites require dry heat to reproduce. no matter what, if it gets above 90 degreees in the grow room, no spray on earth can contain those damn mites. some essential oils are repellents as well.
