Emergence of Citrus Blackfly from Insecticide-Treated Citrus Leaves, 1978

Fourteen insecticides were screened against citrus blackfly nymphs. Efficacy was evaluated by determining the number of adults emerged/leaf during a 3-wk (July-August) observation period. Two methods of application were assessed; in the first, 10 leaves each were sprayed until runoff with suspensions of the insecticides and in the second, 10 leaves each were dipped for 5 sec in the suspensions. Each experiment was divided into 2 tests due to time restrictions. Test 1 consisted of the screening of 11 compounds and Test II consisted of the screening of 3 compounds. Each test contained its own control. All leaves were allowed to dry, then each leaf was placed in a petri dish, and citrus blackfly emergence was noted.