Insecticide Efficacy Against Twospotted Spider Mites, Georgia, 1985

Five acaricides were tested against twospotted spider mites on Irish shamrock grown in 4.5 inch square pots in the greenhouse. The plants only had a low to moderate infestation level at the beginning of the experiment. The experimental design was a RCB with 4 replications of single pot treatments. All acaricides were applied with a compressed air sprayer at 30-35 psi until runoff. Pretreatment counts were made the day of pesticide application. Efficacy was determined bv removing 3 leaves from each plant and counting the number of mites and eggs in, a 2 cm2 area on the lower surface of each leaf.