E81

This trial was conducted to evaluate insecticides allowed for organic production. The trial was conducted on a commercial organic farm in Nedrow, NY with a documented squash vine borer population. ‘Dundoo’ zucchini seeds were sown into 50 cell flats in an organic mix on 17 May. Transplants were set by hand on 29 May in a field on 4 ft row centers, with a 6 ft wide access drive on one side. Transplants were irrigated twice with a Neptune’s fish Seaweed Blend at a rate of 1 oz/gal with a backpack sprayer to aid establishment. All plants were treated with Surround WP at a rate of 25 lb/acre at establishment and weekly for two weeks to prevent damage from striped cucumber beetle. Five treatments and an untreated control were arranged in a RCB design with three replications. Each plot consisted of five plants spaced 18 inches apart with 3 ft between treatments. Sprays were applied with a CO2 pressurized backpack sprayer at 40 psi delivering 40 gal/acre through two TeeJet 8002VS flat fan nozzles spaced 19 inches apart. Treatments included Agree WG (Bt aizawi) at 2 lb/acre, Entrust (spinosad) at 2.5 oz/acre, Javelin (Bt kurstaki) at 1.5 lb/acre, Mycotrol (Beauveria bassiana) at 1 qt/acre, Neemix 4.5 (azadirachtin) at 16 oz/acre, and an untreated check. The first spray was applied 1 Jul, four days after adult moths were first caught in pheromone traps. Two more sprays were applied on 11 and 18 July. On 8 Aug plants were evaluated for SVB infestation by examining the base of each for frass and tunneling damage. Data (% infested plants per plot) were analyzed by ANOVA and means separated using the Fisher’s LSD test.