Abstract
Abstract A test was conducted on the Burden Research Plantation, LSUAC, Baton Rouge, LA, to determine the efficacy of 15 insecticide treatments for the control of banded cucumber beetle. Treatments were arranged in a RCB design with four replications. The cultivar ‘Beauregard’ was planted on 18 May. Plots were 3 rows wide (4 ft./row) and 30 feet long. Insecticides were applied on an approximately weekly basis starting two months after transplanting (18, 23 Jul, 1,8, 14, 22, 29 Aug). A CO2-pressurized back pack sprayer was used (30 psi) with a single-row boom (20 inches wide) containing 3 nozzles (Cone Jet sx-10) and calibrated to deliver 25 gpa. Sweetpotatoes were harvested on 6 Sep and rated for damage. On each day of application, banded cucumber beetle populations were estimated before spraying by taking 25 sweeps per plot and recording the number of beetles collected. The following day, 24 hours later, 25 sweeps were taken to obtain a post-treatment count. The percentage change in population level from pre- to post-application was analyzed for each application date.
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