Abstract
Abstract Experimental sprays were applied to 4-tree plots arranged in a completely randomized design. Each plot contained the following cultivars: Delicious, Golden Delicious, Stayman, and Rome Beauty. Each treatment was replicated 4 times. Trees were planted to a spacing of 12 × 35 ft. Treatments were applied with a truck-mounted John Bean sprayer, 35 gpm pump, equipped with a handgun to thoroughly wet the trees. Approximately 2.9 gal of spray was applied per replicate tree (ca. 300 gal/acre). Refer to the tables for dates of application. During the experiment, general maintenance sprays of Rubigan, captan, and calcium chloride were applied to all plots. Effectiveness of chemicals on TABM was assessed by counting shelters observed in a 5 min observation/tree (cvs Stayman and Golden Delicious) and by scoring for injury all drops after 1 Jul and one picked sample of approximately 200 apples/tree on 'Golden Delicious,' 'Stayman,' and 'Rome Beauty' in late Sep and early Oct. Pest pressure was heavy.
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