Abstract
Abstract Applications were made to 20 year-old Bosc and Cornice pear trees using a commercial air-carrier sprayer set to deliver 200 gpa. Each treatment was composed of 5, 20-tree replicates. Manzate 200 DF at either 6 or 8 lb formulated/acre was applied at pink bud (5 Apr), petal fall (28 Apr) or at both timings. Morestan 25 WP (5 lb/ac) was applied at the pink stage and used as the standard treatment. Estimates of PP nymphal densities were made by counts on 20 fruit cluster leaves/rep. Adult PP were recorded from 3 beating tray samples per replication.
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