Abstract
Cotton was planted no-till on 10 May into a Goldsboro sandy loam soil in 38-inch rows in southeastern North Carolina near Trenton. The fertility and herbicide programs followed extension recommendations for cotton in this region. Plot size was 40 ft 4 rows with four replications arranged in a RCB design. Insecticide applications were applied on 31 Jul, 5 and 15 Aug with a backpack-type, CO2-pressurized sprayer calibrated to deliver 8.0 gpa at 50 psi with a single TX-8 Spray Systems nozzle 18 inches over the row. Twenty five squares and 25 bolls were examined for damage and live bollworms on 14 Aug. On 25 Aug, 25 bolls only were examined for damage and live bollworms. Plots were harvested from the middle two rows with a two-row John Deere picker on 25 Oct. Seed cotton yields were converted to lint cotton/acre using 40% gin turnout. All data were entered into Gylling's Pesticide Research Manager 5.0 software and analyzed via ANOVA and LSD.
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