Abstract
Abstract Plots were four rows (40-inch spacing) wide X 30 feet long and consisted of a randomized complete design with 4 replications. Cotton seed was planted on 15 May on a Commerce silt loam soil which was sidedress fertilized with 90 lb N/acre. Cotton seed was planted with a John Deere model 7100 series planter equipped with 10 inch seed cones mounted to replace the seed hoppers. The seed rate was 4 seeds/row ft. The granular in-furrow treatment (Temik 15G, 0.5 lb Al/acre) was applied with 8 inch belt cone applicators mounted to replace the standard granular applicators. Terraclor Super-X 2E, 2 quarts formulated/acre, was applied with a compressed air sprayer system attached to 2501 nozzles on the planter. The spray tips were positioned to thoroughly cover the sides and bottom of the seed furrow and were calibrated to deliver 5 GPA finished spray. Stand and plant height data were taken on 16 Jun (data not shown). BWTBW treatments (H. spp.) were applied to Coker 312 (Spray/H. spp.) and Bollgard (Spray/8%) on 17 Jul and 2, 10, 17, 24, and 31 Aug. Square and terminal infestation ratings were taken (larvae/25) on 3, 12, 17, 20, 24, 26 Jul and 1, 3, 9, and 14 Aug. Boll damage and foliage damage ratings were taken on 29 Aug. The test was conducted in the presence of high boll weevil population densities. Eight overspray treatments were used to control aphids, plant bugs, and boll weevils in all plots as follows: Provado 1.6F + Vydate 3.77L, 0.04 + 0.25 lb Al/acre, (20 June); Bidrin 8E + Ovasyn 1.5E, 0.4 + 0.25 lb Al/acre, (28 June); Guthion 2L, 0.25 lb Al/acre, (10 July); andMethyl parathion 4E, 0.33 lb Al/acre, (12 July); Methyl parathion 4E, 0.33 lb Al/acre, (28 July and 12, 18 August). Bollgard threshold treatments 2% and 5% were sprayed with Karate IE + Larvin 3.2F at 0.033 + 0.25 lb Al/acre on 10 August. Bollgard threshold treatments 2%, 5% and 8% were sprayed wit Baythroid 2E + Curacron 8E + Larvin 3.2Fat 0.04 + 1.0 + 0.4 lb Al/acre respectively (17 Aug). All Bollgard threshold treatments were sprayed with Methyl parathion 4E + Pirate 3SC + Curacron 8E at 0.33 + 0.25 + 1.0 lb Al/acre on 24 Aug.
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