Citrus Rust Mite Control on Grapefruit, 1988

A completely randomized block design with single tree plots replicated 4 times was used with buffer trees sprayed to prevent possible mite reinfestation. Treatments of 235 gal/acre were applied on 15 Jun with a high pressure handgun sprayer at 400 psi. CRM were counted in 2-1 cm2 using a 10 X hand lens on opposite sites of 25 fruit selected at random from each tree. There were 100 fruit/treatment. Cumulative mite days after treatment and percent fruit russet was determined after 10 wk.