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. Application dates varied between treatments and are given in the table of adult count data. 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/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 magnification. PP russet was rated according to US 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 phytotoxicity after each spray.
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