Control of Lepidopterous Pests on Broccoli, Fall, 1991

Abstract

‘Commander’ cultivar broccoli plants were transplanted on 6 Sep 91 into a Bernow series fine, sandy-loam soil at the Wes Watkins A.R.E.C., Lane, OK. Plots were 15 ft long and 2 rows wide with 10 ft buffers within rows and one row planted with turnips and collards between plots. Rows were spaced 3 ft apart and plants were spaced 1 ft apart within rows. A randomized complete block design with four replications was used. Conventional cultural practices were used and recommended rates of fertilizer were applied. Samplings for CL and aphids were conducted on 19, 24, 26 Sep, 1, 3, 14, and 24 Oct. CL were sized as small (instar 1 & 2) or large (instar 3 6:4). All insecticides were applied with a C02-powered backpack sprayer calibrated at 44.6 gal/acre. Each insecticide treatment was applied on 20, 27 Sep, and 7 Oct.