Abstract
Abstract A test was conducted on the Burden Research Plantation, LSUAC, Baton Rouge, LA, to determine the efficacy of 9 insecticide treatments for the control of sweetpotato weevil, banded cucumber beetle, and white grub. Treatments were arranged in an RCB design with four replications. The cultivar ‘Beauregard’ was planted on 18 May. Plots were 3 rows wide (f 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 and 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. From each plot, 50 roots were randomly selected and the number of white grub feeding holes, the number of banded cucumber beetle holes, and the presence or absence of weevil damage was noted.
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