Physiological Activity of the Boll Weevil During the Fall and Winter in Subtropical Areas of the Rio Grande Valley of Texas

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Results of laboratory and field studies showed that adults of Anthonomus grandis grandis Boheman, captured in Leggett traps baited with grandlure or collected from surface leaf litter and duff during the non-cotton season (September to April) of 1978–1979 and 1979–1980 in a subtropical area near Brownsville, Tex., were unique in that they remained physiologically active throughout the winter. Boll weevils were trapped even on days when minimum temperatures were as low as 1.5°C. Females caught during the fall remained sexually mature, mated, and stored viable sperm in their spermatheca, but egg hatch was not observed under laboratory conditions (artificial diet) during ca. 2 months in the winter. However, these females oviposited fertile eggs when fed for at least 10 days with fresh cotton squares. Catches of teneral weevils were very common throughout the winter, an indication that weevils could remain reproductive through the winter when proper nourishment was available from cotton regrowths or seedling plants in unattended or abandoned fields.

Document Type: Research Article

Publication date: February 1, 1982

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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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