The foraging strategy of Diaeretiella rapae. I. The concept of the elementary unit of foraging.

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Abstract

The searching behaviour of Diaeretiella rapae, the main parasitoid of the cabbage aphid Brevicoryne brassicae, was analysed using whole Brussels sprouts plants. Diaeretiella directed its search on the plant: areas where aphids, or cues indicating their presence, were most expected were preferentially searched, and honeydew secreted by the aphids was used by the wasp as a kairomone for host location. The spatial configuration of the plant and the distribution of aphids and their cues on it have served as a template on which the Diaeretiella foraging strategy has been moulded by natural selection. The individual plant is thus an 'elementary unit of foraging' within the wasp environment.-from Author

Original languageEnglish
Pages (from-to)1057-1068
Number of pages12
JournalJournal of Animal Ecology
Volume56
Issue number3
DOIs
StatePublished - 1 Jan 1987

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