Abstract
Abstract A large plot field study was conducted on a commercial farm near Tivoli, TX, to evaluate the relative effectiveness of Baythroid and Ammo for control of boll weevils on cotton. Treatments were compared in 32-row by 800 ft plots of cotton planted on 38 inch rows. Treatments were replicated 6 times in a paired block design. Beginning ca. 1 wk past first-bloom, applications of each treatment were made on 12, 17, 29 Jun, 5, 9 and 12 Jul. The applications in Jun were done with a high-clearance ground machine, while those in Jul were done by aircraft. Efficacy of the insecticides was evaluated by inspecting 25 randomly chosen squares and ca 7-day-old bolls in each plot for the presence of boll weevil damage. Seed-cotton was hand harvested from designated 10-ft sections of row in each plot for yield analysis.
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