Abstract
Abstract Effects of various insecticides timed for TABM control were assessed for their activity against some other apple pests and their natural enemies. The experimental and registered materials were applied to replicated 12-15 tree plots in a randomized block design. Each plot consisted of alternating trees of ‘Yorking’ and ‘Golden Delicious’. These trees were spaced at 18 X 25 ft and were 17 years old. Experimental sprays were applied with a Friend Airmaster ‘309’ calibrated to deliver 100 gpa at 2.4 mph. Application timings were based on the accumulation of degree days from first adult moth capture in a sex pheromone trap (18 May) in order to predict various percentages of egg hatch for each TABM brood. Degree day calculations were based on minimum and maximum developmental thresholds of 45°F and 91°F, respectively. All applications were complete sprays. A routine schedule of fungicides (Benlate 50DF, Penncozeb 75DF, Rubigan 1EC, and Ziram 76WP) was maintained throughout the experiment.
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