Abstract
Abstract Mature 'Bartlett' 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 randomized block design. All treatments were applied 2 May and 26 Jun. Cold Power and Ray-Gard were also applied 10 May, 23 May, and 25 Jul. Treatments were evaluated for PP control by counts made at 2-wk intervals. Adult PP were counted from a 5 beating-tray sample per replication. PP nymphs were counted from a 50-leaf sample per replicate. Leaf samples consisted of the proximal leaf, distal leaf and 3 leaves from the middle of 10 terminal shoots. Leaves were brushed and resulting slides were examined under 10 × magnification. Fruit damage by insects and mites was rated according to US grade standards for fresh market Bartlett' pears on 2 samples of 25 mature fruit per replication. Factors of fruit quality including firmness, soluble solids, and size were evaluated from 2 10-fruit samples per replicate at normal harvest maturity. Fruit and foliage were examined for phytotoxicity after each spray.
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