Age Distribution of Adult Female Screwworms (Diptera: Calliphoridae) Captured on Sentinel Animals in the Coastal Lowlands of Guatemala

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Abstract:

The age structure of screwworm, Cochliomyia hominivorax (Coquerel), populations was studied in the Guatemalan lowlands with the pteridine technique of age determination. Flies (95% were 4-15 d old) were captured on sentinel animals. Mean age was 7.5 d. The oldest fly captured was 21 d old. Most flies visiting wounds were reproductively mature females. Of these, about one-half oviposited once, one-third oviposited twice, and 1 in 10 completed three ovarian cycles (assuming a 3-d interval between clutches). Periodicity in adult capture rates may be related to the reproductive cycle. Results suggest that local populations are composed of a high proportion of synchronized cohorts.

Document Type: Research Article

Publication date: August 1, 1990

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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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