Abstract
Cotton was planted on 20 May into a Goldsboro fine sandy loam soil on 36 inch rows near at the Upper Coastal Plain Research Station near Rock Mount, NC. Plot size was 40 ft × 4 rows with 4 replications arranged in a RCB design. The fertility and herbicide programs followed extension recommendations for cotton in this region. Insecticides were applied on 22 Jul with a backpack-type, CO2-pressurized sprayer calibrated to deliver 10.0 gpa at 60 psi with a single TX-10 Spray Systems nozzle 18 inches over the row. On 3 Aug, 25 quarter-sized bolls per plot were picked, placed into plastic bags, and taken into the lab where they were examined for internal damage symptoms within 24 hr. Data were analyzed using ANOVA and means were separated using LSD (P ≤ 0.05).
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