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| Nakashima, Yoshitaka; Birkett, Michael A.; Pye, Barry J.; Pickett, John A.; Powell, Wilf; 仲島, 義貴. |
| The role of semiochemicals in mediating intraguild interactions between the seven-spot ladybird, Coccinella septempunctata, and the aphid parasitoid, Aphidius ervi, was investigated. Female parasitoids avoided leaves visited by C. septempunctata adults and larvae during the previous 24 hr. Ethanol extracts of C. septempunctata adults and larvae also induced avoidance responses by A. ervi. Two of the hydrocarbons identified by gas chromatography ( GC) and coupled GC-mass spectrometry (GC-MS), n-tricosane (C23H48), and n-pentacosane (C25H52), when tested individually at levels found in the adult extract, induced avoidance by A. ervi. Further investigation of the larvae extract, and footprint chemicals deposited by adults in glass Petri dishes, confirmed the... |
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Palavras-chave: Intraguild predation; Predator avoidance; Trail; Oviposition decision; Biological control; N-tricosane; N-pentacosane. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/809 |
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