Volatiles from Botrytis cinerea-infected and healthy berries of Vitis vinifera influence the oviposition behaviour of Epiphyas postvittana

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• 作者：S.Z.M. Rizvi and A. Raman
• 刊名：Entomologia Experimentalis et Applicata
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：160
• 期：1
• 页码：47-56
• 全文大小：432K
• ISSN：1570-7458

文摘

Interactions among plants, plant-feeding insects, and plant–pathogenic fungi are partially mediated by volatile compounds. Herbivorous insects use sensory cues to choose host plants for feeding and/or oviposition that are likely to support survival and development of progeny. It is known that some fungus-induced alterations in plants can modify plant volatiles, which are recognized by the olfactory receptors of the insect, either as an attractant or as a deterrent. We tested for the presence of behaviour-modifying volatiles emanating from the berries of m>Vitis viniferam> L. (Vitaceae) infected with m>Botrytis cinerea m>Pers. (Helotiales). We tested the olfactory behaviour of adults of m>Epiphyas postvittana m>Walker (Lepidoptera: Tortricidae) to these volatiles using two-choice and wind-tunnel experiments. We hypothesized that olfactory cues influence m>E. postvittanam>'s oviposition behaviour. We found that volatiles emanating from m>B. cinerea-m>infected berries did not significantly attract the gravid females of m>E. postvittanam>; consequently, they laid significantly fewer eggs on infected berries. Furthermore, significantly fewer females of m>E. postvittanam> were found attracted to infected berries in the wind tunnel assay. Ethanol and 3-methyl-1-butanol were abundant in m>B. cinerea-m>infected berries. Oviposition assays made with laboratory standards of ethanol and 3-methyl-1-butanol confirmed their role in regulating the olfactory behaviour of m>E. postvittanam> site selection.