Abstract
Abstract A test was conducted to evaluate the efficacy of selected pyrethroid insecticides against BW and TPB in irrigated cotton planted 15 Apr at the Macon Ridge Branch of the Northeast Research Station near Winnsboro, LA. The test consisted of a RBD with 4 replications of 5 row (1.02 m centers) × 15.2 m plots. The test was treated on 2, 6, 9, 12 and 15 Jul. All treatments were applied with a high clearance sprayer and CO2 charged delivery system calibrated to deliver 56.1 liters/ha at 2.8 kg/cm2 through 2, TX-8 nozzles equally spaced per row. Treatments were evaluated on 6, 9, 12, 15 and 19 Jul by visually examining 50 randomly picked squares per plot for boll weevil damage. Treatments were evaluated for tarnished plant bug control on 19 Jul with a standard 38 cm diam sweep net by counting the number of adults and nymphs in two-25 sweep samples/plot. The plots received 1.9 cm irrigation with overhead sprinklers on 14 Jul.
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