Pear, Grape Mealybug Control, 1992

Abstract

Mature pear trees were sprayed with a handgun operating at 600 psi to evaluate pesticides for control of GMB. Plots consisted of 8 single-tree replicates in randomized block design. Treatments were evaluated by counting GMB on 10 shoots per replicate on 2 Jun and by rating 25 fruits per replicate at harvest for presence of nymphs in the calyx and fruit russet from honeydew. All early season treatments except AC 303630 were applied twice, at clusterbud (CB) stage (26 Mar) and petal fall (PF) stage (17 Apr) of tree development. AC 303630 was applied only once at PF. Three of the treatments were applied only at the time of summer generation crawlers activity (1 Jul).