Aphid, Hornworm and Budworm Control on Flue-Cured Tobacco, 1982

Flue-cured tobacco was transplanted in 20 x 20 ft plots at the Southern Piedmont Center, Blackstone, Va, on May 13. Spacing was 4 ft between rows and 20 in between plants within the row. Plots were arranged in a randomized complete block design replicated 4 times. Treatments were applied to the foliage with a CO2-powered backpack sprayer that delivered 36 gal of finished spray/acre using a solid cone nozzle and 60 psi. Each plot was artificially infested with hornworms and budworms on Jul 5. At 3, 7 and 14 days after application, hornworms and budworms were counted on 20 and 10 plants/plot, respectively, and aphids were counted on 2 upper leaves of 5 plants/plot in the 3 center rows of each plot. Aphid counts were transformed to Log.10 (aphid count + 1) before analysis.