Insect growth regulators and conventional insecticides for suppression of citrus mealybug.
The effectiveness of sprays of 3 insect growth regulators and 6 conventional insecticides against the citrus pest Planococcus citri (Risso) was evaluated in greenhouse and field tests in Texas during 1974-77. In the greenhouse, 0.10% kinoprene, 0.05% dimethoate and 0.025% methidathion controlled infestations on Mexican lime. In full-season tests in grapefruit orchards, 0.025-0.10% kinoprene, 0.025% CGA-13353 [ethyl 3-methyl-4-[4-(phenylmethyl)phenoxy]-2-butenoate] and 0.025-0.10% epofenonane (Ro 10-3108) gave control comparable to that obtained with 0.06% dimethoate. In tests on the efficacy against specific life stages, both insect growth regulators and conventional insecticides were most effective against first-instar nymphs and least effective against adults.