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Late Season Immigration of Boll Weevils into an Isolated Cotton Plot

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A small plot of cotton and pheromone traps were used to measure late season immigration of Anthonomus grandis Boheman during 1974. The test location was isolated by ca. 3 miles from commercial cotton fields. Immigratory weevil movement into the plot began Aug. 5 and continued until Nov. 11. Weevils entered the plot in numbers ranging from an estimated 500 to 10,000/acre/wk.

Immigratory weevils captured on traps and those entering the plot prior to mid-October were primarily reproductive insects. Peak immigration of diapausing weevils occurred after Oct. 24.

Pheromone trap and cotton plot records indicated the same pattern of weevil movement except for the 1st 3 wk of immigratory weevil activity. Traps indicated an absence of weevil activity during the 1st 3 wk of August while weevils were entering the cotton plot in numbers estimated at 1000–3000/acre/wk.

Document Type: Research Article

Publication date: October 15, 1975

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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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