Abstract
Abstract ‘ Red Norland’ potatoes were planted in 20 foot rows on 29 Mar, ’95. Plots consisted of a single treatment row. The distance between rows was 64 inches and the distance between plants within the row was 10 inches. Plots were arranged in a RCB design with 4 replications. The soil is a Norfolk “A” loamy sand. All spray treatments were mixed in 1.5 gallons of water and applied with a custom built compressed air row crop sprayer. Each row was covered by 6 drop nozzles delivering 50 gallacre at 30 psi. Treatments were applied 19 and 24 May and 4 Jun. Plots were treated with Asana XL 0.05 Ib (AI)/acre and PBO 8EC 0.375 Ib (AI)/acre on 9 and 19 Jun to control Colorado potato beetle adults. In evaluating the treatments, direct counts of the number of CPB adults, larvae, and egg masses110 plants and % defoliation were recorded. Defoliation categories were assigned using a pretransformed defoliation rating scale, based on dividing 90° into 13 steps corresponding to arcsin transformation values (Little & Hills 1978). Yields were taken on 26 Jun from 20 feet of row.
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