oa African Entomology - Oviposition, development and searching behaviour of Cotesia flavipes Cameron and Cotesia sesamiae (Cameron) (Hymenoptera: Braconidae) in relation to aestivating and non-aestivating Chilo spp. (Lepidoptera: Pyralidae) larvae in maize

Volume 5, Issue 1
  • ISSN : 1021-3589



Oviposition, development and searching behavior of Cotesia flavipes Cameron and Cotesia sesamiae (Cameron) on aestivating Chilo spp. and non-aestivating Chilo partellus (Swinhoe) larvae were investigated. Oviposition experiments indicated that parasitoids readily accepted aestivating and non-aestivating larvae for oviposition under laboratory conditions. The development times of C. flavipes from egg to adult emergence in aestivating compared with non-aestivating host larvae were not significantly different. Field-cage studies demonstrated that C. flavipes and C. sesamiae were unable to locate and paraSitize aestivating Chilo spp. larvae in dry maize stems. Parasitization of non-aestivating C. partellus larvae was significantly higher in cages where C. flavipes was released (26.21 %) than in cages where C. sesamiae was released (11.32 %).

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