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The Tea Weevil, Myllocerinus aurolineatus, is Attracted to Volatiles Induced by Conspecifics

文献类型： 外文期刊

作者： Sun, Xiao-Ling 1 ; Wang, Guo-Chang 1 ; Cai, Xiao-Ming 3 ; Jin, Shan 1 ; Gao, Yu 1 ; Chen, Zong-Mao 1 ;

作者机构： 1.Chinese Acad Agr Sci, Tea Res Inst, Hangzhou 310008, Zhejiang, Peoples R China

2.Henan Inst Sci & Technol, Xinxiang 453000, Peoples R China

3.Zhejiang Acad Agr Sci, Hangzhou 310008, Zhejiang, Peoples R China

关键词： aggregative behavior;antennal response;tea quality;tea yield

期刊名称：JOURNAL OF CHEMICAL ECOLOGY （ 影响因子：2.626； 五年影响因子：2.984 ）

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收录情况： SCI

摘要： The tea weevil, Myllocerinus aurolineatus (Voss) (Coleoptera: Curculionidae), is a leaf-feeding pest of Camellia sinensis (O.Ktze.) with aggregative behaviors that can seriously reduce tea yield and quality. Although herbivore-induced host plant volatiles have been shown to attract conspecific individuals of some beetle pests, especially members of the Chrysomelidae family, little is known about the volatiles emitted from tea plants infested by M. aurolineatus adults and their roles in mediating interactions between conspecifics. The results of behavioral bioassays revealed that volatile compounds emitted from tea plants infested by M. aurolineatus were attractive to conspecific weevils. Volatile analyses showed that infestations dramatically increased the emission of volatiles, (Z)-3-hexenal, (Z)-3-hexenol, (E)-beta-ocimene, linalool, phenylethyl alcohol, benzyl nitrile, indole, (E, E)-alpha-farnesene, (E)-nerolidol, and 31 other compounds. Among the induced volatiles, 12 chemicals, including gamma-terpinene, benzyl alcohol, (Z)-3-hexenyl acetate, myrcene, benzaldehyde, (Z)-3-hexenal, and (E, E)-alpha-farnesene, elicited antennal responses from both sexes of the herbivore, whereas (E)-beta-ocimene elicited antennal responses only from males. Using a Y-tube olfactometer, we found that six of the 13 chemicals, gamma-terpinene, benzyl alcohol, (Z)-3-hexenyl acetate, myrcene, benzaldehyde, and (Z)-3-hexenal, were attractive to both males and females; two chemicals, (E/Z)-beta-ocimene and (E, E)-alpha-farnesene, were attractive only to males; and four chemicals, (E)-4,8-dimethyl-1,3,7-nonatriene, phenylethyl alcohol, linalool, and (Z)-3-hexenol, were attractive only to females. The findings provide new insights into the interactions between tea plants and their herbivores, and may help scientists develop new strategies for controlling the herbivore.

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