Abstract

Abstract Mature pear trees were sprayed with handguns operating at 600 psi to evaluate pesticides for control of pear pests. Plots consisted of 5 single-tree replicates in a randomized block design. Treatments were applied 3 or 4 times depending on materials and schedules tested. Treatments were evaluated for PP and mite control by counts made at 2-wk intervals. Adult PP were counted from a 5-beating-tray sample/replication. PP nymphs and phytophagous mites were counted from a 50-leaf sample/replication. Leaf samples consisted of the proximal leaf, distal leaf, and 3 leaves from the middle of each of 10 terminal shoots. Leaves were brushed and slides were examined with a binocular dissecting microscope. PP russet was rated according to U.S. grade standards for fresh market ‘Bartlett’ pears on 2 samples of 25 mature fruits/replication. Factors of fruit quality, including firmness, soluble solids, and size, were evaluated from 2 10-fruit samples/replicate at normal harvest maturity. Fruit and foliage were examined for phytotoxicitv after each treatment.

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