Abstract
Abstract Treatments were applied to four-tree (including ‘Cortland’) plots replicated three times in a RCB design. All treatments were applied dilute to runoff using a high-pressure handgun sprayer at 300 psi delivering from 190 (prebloom) to 300 (postbloom) gpa depending upon foliage density. Trees on the M.2 rootstock were 34 years old, 10 ft high, and 12 ft wide. Dates of application were: 9 Apr [delayed dormant (DD)]; 22 Apr [pink (P)]; 27 May [petal fall (PF)]; 6 Jun [first cover (IC)]; 19 Jun [second cover (2C)]; 11 Jul [third cover (3C)]; 28 Jul [fourth cover (4C)]; and 8 Aug [fifth cover (5C)]. Fungicides applied to all treatments were Benlate, captan, Dithane, Nova, and Rubigan. Control of fruit-feeding insects was assessed at harvest maturity (18 Sep) by randomly selecting 100 fruit and scoring for external damage by each pest; subsequently, fruits were dissected to detect internal damage. Damage by early PC designates ovipositional scars, while late PC indicates feeding punctures.
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