Citrus Rust Mite Control in San Diego Co., 1979

A number of acaricides were tested for efficacy against citrus rust mite in a Valencia orange grove near Bonsall, California. Treatments were applied on Aug 16-17 by handgun (450 psi) with about 1500 gal per acre, or 15-20 gal per tree. There were three one-tree replicates per treatment. Mite infestation levels were measured by counting mites with a 14X hand lens or 12X hand lens with grid: four subsamples of 1 cm2 each per fruit, 10 fruit per replicate. There was damage to fruit on the water controls, but not on any of the treatments.