Beneficial insect for spider mite control. These predators feed on a wide range of spider mites, both immatures and adults. Use 1 predator per 25 pest mites or 2 predators per infected plant. Greenhouse rate is 1 predator per sq. ft. of planted area plus 10 predators per mite-infested leaf. 1000 ea are shipped. Needs 60-90% humidity. Slightly larger than spider mites, this active orange predator eats 20 young or 5 adult spider mites per day (and often runs out of food). If mites reinfest, recommended to release Persimilis every 3-5 weeks or introduce Californicus at same time or two weeks following Persimilis introduction. Recommended for greenhouses, interiorscapes, field strawberries in coastal areas. ***Must be shipped Next Day Air. *** For orders over 1 unit please call to place order. System not able to calculate freight on multiple orders***