Mite populations can explode when they feed on wheat germ, yeast, cheese, powdered milk, flour, or grain. In finely ground commodities such as flour and powdered milk, infestations are confined to the surface layer. Whole or cracked grains and nuts may be infested throughout. Heavily infested grain and feed become tainted and unpalatable as animal feed. Prevention Unfortunately, once large numbers of mites are noted, control is difficult if not impossible.
Sanitation is the key to prevention.
There are few pesticide solutions to this problem. If infestations are extremely heavy, infested products should be destroyed. Moderate infestations can be handled a couple of ways, depending upon the value of the commodity, type of commodity, and end use. Remember that only certified applicators can purchase and apply fumigants and that all label directions must be followed. If necessary, treated grain may be used immediately for any food or feed purpose.