Citrus Mealybug Control, 1977

Conventional insecticides and Insect Growth Regulators (IGR’s) were evaluated for efficacy against citrus mealybug (CMB) in a completely randomized experiment on mature Ruby Red grapefruit trees. Each treatment was replicated four times on single-trees spaced 25 ft x 25 ft. Treatments were applied on Aug 18’77 with a handgun of a John Bean Model 1010-MBTB Sprayer at 250 psi, using about 20 gal per tree. Ten days after application, CMB infested fruit (16/tree) were collected at random and examined under a binocular scope. Mortality counts were made of the crawler, 2nd and 3rd nymphal, and adult stages. Percent mortality of each stage was computed for all treatments.