They are very active during hot, dry weather.
Mites can complete their life cycle in five to eight days depending on temperature.
Theoretically, a single fertilized female can produce 13 million mites in 30 days at a constant temperature of 80 degrees F. Most vegetables, and some ornamentals such as junipers and hollies are preferred hosts. Feeding injury results in discolored, bronze-colored leaves. Check for mites by tapping a branch onto a white sheet of paper and looking for moving specks. Wash off mites with a strong stream of water. Miticides are available.