Sex pheromones in the cereal aphid parasitoidsPraon volucre andAphidius rhopalosiphi |
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| Authors: | U. M. Decker W. Powell S. J. Clark |
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| Affiliation: | (1) Department of Entomology and Nematology, AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, AL5 2JQ Harpenden, Herts, UK;(2) Statistics Department, AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, AL5 2JQ Harpenden, Herts., UK;(3) Present address: RCC Research and Consulting Company Ltd., CH-44S2 Itingen/Basel, Switzerland |
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| Abstract: | Laboratory and field experiments provided evidence for the release of sex pheromones by virgin femalePraon volucre Haliday andAphidius rhopalosiphi De Stefani-Perez (Hymenoptera: Braconidae, Aphidiinae). In Petri dish biosassays, rubber or vermiculite models treated with crude virgin female extracts were frequently approached by males and elicited rapid wing-fanning behaviour and copulation attempts. Delta-shaped water traps containing live virgin females caught large numbers of conspecific males when placed in winter wheat crops. Trapping slightly below crop height resulted in higher catches than trapping above the crop canopy. |
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| Keywords: | Hymenoptera Aphidiinae aphid sex pheromone parasitoid Praon volucre Aphidius rhopalosiphi |
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