Abstract
Abstract A full season study was conducted at the Plant Science Research Farm of the Mississippi Agriculture and Forestry Experiment Station, Mississippi State, MS. Plots were planted to ‘Stoneville 825’ on 7 Jun. All treatments were replicated 4 times and arranged in a randomized complete block design. Each plot was 4 rows (38-inch rows) by 50 ft with 2 buffer rows between plots. Insecticides were applied with a boom-type sprayer calibrated to deliver 6.1 gal/acre total volume at 30 psi through 2 TX-4 nozzles per row. Treatments were applied 26 Jul, 2 Aug, 14 Aug and 19 Aug. All plots were sprayed for boll weevil suppression on 31 Aug, 12 and 20 Sep and 28 Sep and 3 Oct with Guthion 2L (0.25 lb (AI)/acre). Insect populations and plant damage were monitored on 27 Jul, 16 and 21 Aug by making 5-ft whole plant counts in each plot. Yield data were taken on 21 Nov by mechanically harvesting the center 2 rows of each plot.
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