Control of Insects on Spring Peas, 1997

Plots were established 12 May near Albion, Washington, on the Mills-Farr Farm, in a RCBD with 4 replicates 6 x 10 ft. each. Eleven insecticide treatments and an untreated check were used, with Gaucho 480 applied as a seed treatment at 1.0 and 0.5 oz (AI)/cwt. Foliar treatments were applied at the appearance of PA using a CO2-powered backpack sprayer delivering 20 gpa at 20 psi. All treatments were rated by counts of PA per 20 cm of terminal stem 4 per replicate at pre-treatment, 2, 5,7, 10, and 15 DAT. Counts of PW-damaged peas/100 pea sample per replicate were made at harvest. Yield data in oz peas per replicate were collected by threshing in a stationary thresher.