Control of Boll Weevil in Cotton with Selected Insecticides, 1996

Three tests were conducted to evaluate the effi cacy of selected insecticides against boll weevil in cotton planted 18 Apr. Plots consisted of 4 rows (40 inch centers) X 50 ft. in all tests. Treatments were arranged in a RCB design with 4 replications. Insecticides were applied on 28 Jun, 1,3,8, and 12 Jul in all tests. Applications were made with a high clearance sprayer calibrated to deliver 6 gpa through TX-8 hollow cone nozzles (2/row) at 42 psi. Treatments were evaluated by examining 50 cotton flowei buds (squares) per plot 2-4 DAT for evidence of boll weevil damage. No additional foliar insecticides were applied to the plots during this test. The plots received 0.51 inch rainfall on 10 Jul. Data were analyzed with ANOVA, and means were separated according to DMRT.