Diel Activity Cycles in Nymphal Stadia of the German Cockroach (Dictyoptera: Blattellidae)

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Abstract:

Computerized moving-image analysis was used to determine movement behavior of individual German cockroach, Blattella gennanica (L.), nymphs (second and fifth instars) between food, water, and harborage resource sites. Both second and fifth instars (n =10) were examined for the entire nymphal stadium, during which a 12: 12 (L:D) photoperiod was maintained. In addition, corresponding resource consumption rates for these nymphal stages also were determined. Both nymphal stages exhibited a pattern of high activity for the first half of the nymphal stadium, especially during each scotophase. For the last third of the stadium, the nymphs remained continuously in the harborage, moved very little, and consumed little or no resources. We discuss implications of these findings regarding control, future research, and possible hormonal behavior regulation.

Document Type: Research Article

Publication date: August 1, 1994

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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