Food selection in adults and larvae of three species of Lepidoptera: a behavioural and electrophysiological study |
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Authors: | W M Blaney and M S J Simmonds |
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Institution: | (1) The Behavioural Entomology Group, Department of Biology, Birkbeck College, WC1E 7HX London, UK;(2) Jodrell Laboratory, Royal Botanic Gardens, Kew, TW9 3AB Richmond, Surrey, UK |
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Abstract: | Adults and larvae of Spodoptera littoralis, Heliothis virescens and Heliothis armigera were tested with a range of sugars, amino acids, sugar alcohols and allelochemics. Feeding behaviour was correlated with the electrophysiological responses of maxillary styloconic sensilla in the larvae and proboscis styloconic sensilla in the adult. The neural response was more vigorous in larvae than in adults but otherwise the spectra of responses were similar in the two life stages. Phagostimulants and antifeedants stimulated maximally different sensilla in larvae but not in adults. The responses of adult sensilla to sugars and amino acids were significantly correlated to behaviour in all three species, but only in H. armigera was there a similar correlation with the sugar alcohols and allelochemics. |
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Keywords: | Spodoptera littoralis Heliothis virescens H armigera electrophysiology feeding behaviour adults larvae proboscis sensilla antifeedants phagostimulants |
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