Abstract
Abstract Sixteen treatments were tested for relative efficacy against thrips in irrigated cotton planted 5 May at the Delta Branch Experiment Station, Stoneville, Miss. Plots were 8 rows (40- inch centers) × 50 ft and were arranged in a randomized complete block design with 5 replications. Foliar treatments were applied to the center 4 rows by high-clearance spray tractor with a compressed-air plot spray system calibrated for 4.4 gal/acre at 4 mph using 1 flat fan nozzle (2008e)/row. Applications were made on 28 May. Other treatments were applied in furrow during planting. All plots received insecticide treatments for nontarget pests as needed during the season. Several plants from each plot were clipped and put in jars in the field and returned to the lab. They were then washed, and the thrips were filtered onto filter paper for counting under a dissection microscope. All data were collected from the center 2 rows. Yield was obtained by mechanical picker.
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