This predatory mite attacks the immature stages of the western flower thrips and onion thrips. Control is not generally apparent until 2 or 3 months after releases begin. Distribute 1 to 10 predators per square foot per week depending on plant size and foliage density; experimentation is encouraged. Releases should start when thrips populations are low (less than 10% of leaves with adult thrips or 25% of leaves with larvae).

Care and Distribution: Adult thrips predator mites are shipped loose in bran or packaged in sachets with all life stages, called controlled release system (CRS) bags, for hanging on plants where sprinkled bran may be less effective. Distribution should be thorough and heaviest during hot, dry months.