Abstract
Abstract Treatments were applied to 0.1-acre blocks of 4-tree plots in a randomized complete block design consisting of 4 replicates/treatment. Each plot contained one each ofcultivars ‘Yorking,’ ‘Delicious,’ ‘Golden Delicious,’ and ‘Rome Beauty.’ Sprays were applied as alternate-row middle applications with a Myers Mity Mist sprayer calibrated at 50 gal/acre, driven at 2 mph. Spray dates were 24 and 30 Jun and 26 Jul (Carzol + Vendex treatment only). A routine schedule of fungicides and insecticides (Dithane M-45, Guthion, and calcium chloride) was maintained throughout the experiment. Effectiveness of treatments against ERM was evaluated by counting mites several times during the season on samples of 25 leaves/tree (‘Yorking’). The predator S. punctum was observed by making 3-min counts of adults and larvae around the periphery of ‘Yorking’ trees.
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