Abstract
Abstract ‘Ohio 7870’ tomato transplants were planted in 25-foot rows on 15 May ’85. Plots consisted of a treatment row buffered on each side by an untreated guard row. The distance between rows was 64 inches with 12 inches between plants within the row. The plots were arranged in a randomized complete block design with 4 replications. The soil was a Norfolk “A” loamy sand. Conventional spray treatments were applied at a rate of 50 gal/acre at 90 psi. Treatments were applied with a custom built row crop sprayer equipped with 6 drop nozzles/row. Electrostatic sprays were applied with a hand-held ElectrodynR sprayer made by ICI. All the bozzles (nozzles plus bottle) were calibrated to deliver 0.10 ml/s of formulation which, when (raveling at a speed of 2 mph delivers 0.8 pt/acre of formulation. The flow rate cannot be altered, so rate changes were accomplished by altering ihe speed of travel. Treatments were applied on 27 Jun, 3 and 29 Jul. In evaluating the treatments, direct counts of the number of CPB larvae/10 plants and the % defoliation were recorded. Yields were taken on 6 Aug ’85.
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