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Overwinter Survival of Boll Weevil (Coleoptera: Curculionidae) in Southern Texas: Entrapment in Desiccated Bolls

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Abstract:

Research conducted in the Lower Rio Grande Valley of Texas demonstrated the significance of cotton residue as potential overwintering habitat for boll weevils, Anthonomus grandis Boheman. Observations of boll weevil cohorts under laboratory conditions demonstrated the ability of immature stages to complete development within desiccating bolls, and following eclosion, the ability of adults to survive considerable periods of entrapment (up to 3 mol within desiccated bolls with little or no adverse effects on the reproductive system. Field surveys conducted during 1985 revealed: (1) significant densities of boll weevils overwintering in freeze-killed cotton regrowth between 25 January (54,000 per ha, 94.6% immature stages) and 5 April (200 per ha, 100% adults), and (2)a significant emergence of adult boll weevils (≍ 1,600adults per ha during a 30-d period) from buried residue of cotton plants "destroyed" by conventional tillage operations ≍3 mo earlier. Both habitats allowed boll weevils (both adults and immature stages) to overwinter in numbers greatly in excess of established economic thresholds.

Document Type: Research Article

Publication date: April 1, 1993

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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