Oviposition by butterflies on young leaves: Investigation of leaf volatiles |
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Authors: | Bergström Gunnar Rothschild Miriam Groth Inga Crighton Cathy |
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Institution: | (1) Department of Chemical Ecology, Göteborg University, Carl Skottsbergs Gata 22, S-41319 Göteborg, Sweden;(2) Ashton Wold, PE8 5LZ Peterborough, United Kingdom |
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Abstract: | Summary Various butterflies select young foliage on which to lay their eggs; volatiles emitted by young and old leaves have been compared (by sorption enrichment, followed by GC-MS) to gauge possible qualitative and quantitative differences between the two age groups. The plants investigated are cabbage (Brassica oleracea), two milkweeds (Asclepias syriaca andA. curassavica), the bitter orange (Citrus aurantium) and the lime (C. aurantiifolia). The chemical compounds identified belong to three classes, isoprenoids, fatty acid derivatives and benzenoids. Quantitative differences were found between young and old leaves, of which a few may be characteristic of young leaves only. Thirty-four single trials withDanaus plexippus exposed to volatiles from young and old leaves are recorded. |
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Keywords: | oviposition sites leaf volatiles gas chromatography-mass spectrometry (GC-MS) head-space adsorption isoprenoids fatty acid derivatives benzenoids Asclepias Brassica Citrus |
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