Control of Insect Pestsl On Fall-Seeded Canola, 1997B

Plots were established in a RCBD with 4 replicates of 20 X 30 ft at the USDA-ARS Western Regional Plant Materials Introduction Center at Central Ferry, WA, on 10 Oct. Treatments were made at full bloom with a CO2-powered backpack sprayer at 20 gpa at 20 psi on 21 May except for Gaucho 75 ST applied as a seed treatment at planting. All sprayed insecticides were buffered to pH 5.0. Treatments were evaluated for pre-treatment count 215 DAE, 7 DAT (222 DAE), 12 DAT (227 DAE), and 25 DAT (240 DAE) by counting the number of CA colonies per m2 (6.6 linear ft of row) with mean number of CA per colony. CSPW were counted with per 180° sweeps of a 14-inch sweep net on evaluation dates. Counts of CSPW exit holes per 100 pods per replicate were made at harvest, and yield data was collected.