Large capacity boll weevil, Anthonomus grandis grandis Boheman, traps with grandlure attractant were used to measure adult boll weevil populations in the Lower Rio Grande Valley of Texas after the routine field operations of defoliation, harvest, shredding, and stalk-pulling. This study demonstrated that large populations of boll weevils persist in cotton fields even after the cotton crop has been destroyed. Significant increases in the percentage variation of trapped boll weevils relative to the numbers collected just before each field operation were observed after defoliation, harvest, shredding, and stalk-pulling, but the percentage variations followed a quadratic pattern with signficant correlation. Numbers of adult boll weevils caught on board traps deployed at 15-m intervals on windward and leeward edges of cotton fields suggested that boll weevil populations in flight after field disturbances might be affected by large-capacity trapping.
Species 1: Coleoptera Curculionidae Anthonomus grandis (boll weevil)
Keywords: trapping, cotton
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