Colorado Potato Beetle Control on Potatoes With in-Furrow Treatments 1995

Abstract

Abstract ‘Red Norland’ potatoes were planted in 20 foot rows on 29 Mar, ’95. Plots consisted of single treatment rows. 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 was a Norfolk “A” loamy sand. Initial furrow treatments were mixed in 10 gallons of water and applied with an Ag Tech airblast sprayer. Twelve row blocks were applied to the seed at the rate of 20 gal/acre with a small watering can. In evaluating the treatments, direct counts of the number of Colorado potato beetle adults, larvae and egg masses/ 10 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.