Response to host age of the egg parasitoid Anaphes n.sp. (Hymenoptera: Mymaridae) |
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Authors: | C. Picard J. L. Auclair G. Boivin |
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Affiliation: | 1. Departement de Sciences biologiques , Université de Montréal , Montréal, Québec, H3C 3J7, Canada;2. Research Station, Agriculture Canada , 430 Bonl. Gouin, Saint‐Jean‐sur‐Richelieu, Québec, J3B 3E6, Canada |
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Abstract: | The mymarid Anaphes n.sp. was observed to parasitize the eggs of the carrot weevil Listronotus oregonensis (LeConte) up to 138 h old at 23±1°C and 18L:6D. Adult emergence of the parasitoid was observed in 85%‐97.5% of the weevil eggs 42–138 h old and host embryogenesis was interrupted in nearly 100% of these eggs. In host eggs of 18 h old, parasitism was very high but not all parasitoids completed their development and their subsequent emergence was generally retarded. An.sp. could parasitize host eggs 162 h old, but such an attack rarely retarded the normal development of the host. The parasitoid was unable to complete its development in sterile carrot weevil eggs. |
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Keywords: | Insecta Anaphes n.sp. carrot weevil biological control |
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