International Journal of Tropical Insect Science

, Volume 29, Issue 3, pp 130–140 | Cite as

Physiological suitability of six West African gramineous borers (Lepidoptera: Noctuidae, Pyralidae) for development of Cotesia species complex (Hymenoptera: Braconidae)

  • Y. HailemichaelEmail author
  • F. Schulthess
  • J. W. SmithJr
  • W. A. Overholt
Research Paper


Three gregarious, endoparasitic braconids, a Kenyan strain of Cotesia sesamiae, and the exotic Cotesia flavipes and Cotesia chilonis were imported into Benin as candidates for biological control of stem- and cob borers of maize and stemborers of millet. Host acceptability and host suitability of six gramineous borers occurring in western Africa, the noctuids Sesamia calamistis, Sesamia poephaga, Busseola fusca, the crambid Coniesta ignefusalis, and the pyralids Eldana saccharina and Mussidia nigrivenella, to these parasitoids were evaluated to test the hypothesis that new associations were superior over old association parasitoid-host relationships. All hosts were accepted by all Cotesia spp., except M. nigrivenella, which was not attacked by C. chilonis. Parasitoid progeny developed successfully in S. calamistis, S. poephaga and C. ignefusalis. S. calamistis was the most suitable host in terms of duration of developmental time, brood size and mortality of parasitoid progeny. It was concluded that because of its host specificity, the old association parasitoid C. sesamiae would have the highest chance of establishment in cereal systems in West Africa.

Key words

Cotesia stemborer host acceptability host suitability encapsulation biological control new associations maize West Africa 


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Copyright information

© ICIPE 2009

Authors and Affiliations

  • Y. Hailemichael
    • 1
    • 2
    Email author
  • F. Schulthess
    • 2
    • 3
  • J. W. SmithJr
    • 1
  • W. A. Overholt
    • 4
  1. 1.Biological Control Laboratory, Department of EntomologyTexas A&M UniversityCollege StationUSA
  2. 2.Biological Control Center of AfricaInternational Institute of Tropical AgricultureCotonouBenin
  3. 3.ChurSwitzerland
  4. 4.Department of Entomology and NematologyUniversity of FloridaFort PierceUSA

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