Abstract
Abstract An experiment was designed to determine the optimum period for using Pydrin, to control second brood tufted apple budmoth. Sprays were applied to four- or five-tree plots arranged in a randomized block design consisting of five replicates of each treatment. Each plot consisted of alternating ‘Golden Delicious’ and ‘York Imperial’ trees. Treatments were applied with a Friend Airmaster 393 sprayer at 25 gal/acre per alternate side at 2 mph. Rates for treatments are listed as amounts per acre per both sides (50 gal/acre). Effectiveness of chemicals on fruit feeders was assessed by scoring for injury fruit sample at harvest (Golds and Yorks). Apple samples averaged 210 fruits per replicate and 1,050 per treatment. Pest pressure was moderate throughout the season.
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