Abstract
Abstract Flue-cured tobacco was transplanted on 29 Mar at the Coastal Plain Experiment Station in Tifton, GA. Production practices were used according to Georgia Cooperative Extension Service guidelines. A preplant incorporated tank mix of the following was applied: Tillam and Devrinol for weed control, Ridomil for blue mold control, Nemacur for nematode suppression, and Lorsban for wireworm and mole cricket control. Fertilizer (6-6-18) was applied in a split application at a rate of 1000 lb/acre. Plots 4 rows wide (44 inch row spacing) × 20 ft long were arranged in a RCBD with 4 replications. On 9 Jul all plants in each plot were cut down to a 12 inch mainstalk and all leaves were removed. All cut plants were then allowed to regrow with 2-3 main shoots. On 23 Jul, 5 insecticide treatments (plus an untreated control) were applied to the center 2 rows of selected plots using a CO2-powered backpack sprayer equipped with three TX-12 nozzles directed over a single row, delivering 30.3 gpa at 40 psi. The number of live hornworms was recorded per 10 plants on row 2 of each plot prior to the application, and 5, 10, and 14 DAT. All data were subjected to ANOVA and Duncan’s Multiple Range Test.
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