Adult Movement and Dynamics of Clavigralla tomentosicollis (Heteroptera: Coreidae) Populations in Cowpea Fields of Benin, West Africa

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Abstract:

In southern Benin the temporal dynamics and adult movement of Clavigralla tomentosicollis Stål were investigated in cowpea fields during 1991 and 1992 by counting and mark—recapture methods. The phenology and adult movement of this pest were related to the pod and seed formation period. A rapid colonization by immigrating adults closely coincided with the pod formation phase of the plants. Oviposition occurred at the beginning of pod maturation and was succeeded by an increase of the nymphal density until pod harvest. The analyses of adult movement yielded daily emigration rates of 7—20% of the resident adult densities, whereas the daily percentage of in situ adult mortality was <5%. The decline in the number of adults toward harvest time is therefore mainly caused by emigration rather than to field mortality. The high mobility of C. tomentosicollis and the rapid field colonization are important elements in the planning of adequate pest management strategies.

Document Type: Research Article

Publication date: April 1, 1997

More about this publication?
  • 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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