Physiological and Behavioral Characteristics of Chilocorus spp. (Coleoptera: Coccinellidae) in the Laboratory Relative to Effectiveness in the Field as Biocontrol Agents

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Abstract:

Differences between six Chilocorus spp. in their usefulness as biocontrol agents in southern Africa were reflected in aspects of physiological and behavioral measurements derived from a quality monitoring program in the laboratory. Differences in nahlfal climatic adaptations and distributions of Chilocorus bipustulatus (L.), C. cacti L., C. distigma (K1ug), C. infernalis (Mulsant), C. nigritus (Fabricius), and C. simony Sicard were not as accurately reflected in the relationship between feeding rate and temperature as in mortality as a function of time of exposure to high temperature. The effects of various rearing and handling procedures were evaluated focusing on C. nigritus. The vigor of C. nigritus was not improved by maintenance under fluctuating temperatures. Feeding rates of this species were lower during the scotophase than during the photophase and increased as a function of duration of starvation. The weights of adult Chilocorus spp. at eclosion was a function of larval diet and increased with adult feeding for variable lengths of time depending on species and larval diet before plateauing. These results have implications for the rearing of, experimentation with, and use in biocontrol of these Chilocorus spp.

Document Type: Research Article

Publication date: February 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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