Abstract
Abstract Cotton was planted 11 Jun in 4 row plots (40-inch centers) × 50 ft on the Northeast Research Station (Macon Ridge Branch) near Winnsboro, La. Treatments were arranged in a randomized complete block design and replicated 4 times. Insecticides were applied on 10, 14, 17, and 23 Aug. Applications were made with a high clearance sprayer calibrated to deliver 6 gal total spray/acre through Teejet X-5 hollow cone nozzles (2/row) at 40 psi. Methyl parathion (0.3 lb [AI%/acre) was applied on an “as needed” basis for boll weevil control. Treatments were evaluated by examining 50 cotton fruit (squares and bolls) for evidence of damage and the presence of larvae. The test plots received 0.3-inch rainfall on 13 Aug and 1.6-inch rainfal on 20 Aug.
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