Abstract
Abstract Cotton was planted 20 Jun in 40-inch rows (8-row X 75-ft plots) at the Texas Agricultural Experiment Station at Chillicothe. The experimental design was a randomized complete block, with 5 insecticide treat-ments and a check replicated 4 times. Cotton was inspected for aphids on 2, 9, and 15 Aug. Ten leaves from the top half and 10 leaves from the lower half of plants from each plot were examined, and the numbers of aphids were recorded on each inspection date. Pre-treatment counts were made and the insecticide treatments were applied on 19 Aug. Treatments were applied with a John Deere High Cycle 6000 sprayer. Spray drops were used to provide three nozzles per row, delivering 9.7 gpa at 40 psi. Post-treatment aphid counts were made at 4, 6, and 13 DAT.
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