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Your Position :Home->Past Journals Catalog->2010年47 No.1

Comparison of the volatiles from rice plants infested by rice striped stem borer, Chilo suppressalis and rice leaf folder, Cnaphalocrocis medinalis
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Key Words:Chilo suppressalis, Cnaphalocrocis medinalis, rice, volatiles, GC-MS
Abstract:        Previous studies showed that the volatiles emitted from rice plants infested by rice striped stem borer (SSB), Chilo suppressalis (Walker) and   rice leaf folder (RLF) Cnaphalocrocis medinalis (Guenée) had different influences on the behavior of a larval parasitoid of SSB, Apanteles chilonis(Munakata), and adult females of SSB and RLF. However, the SSB or RLF caterpillarinduced rice volatiles remain unclear. In this paper, we collected and identified these volatiles. In total, 28 chemicals were collected from the headspace of three treatments of rice plants, which included terpenoids, aliphatic hydrocarbons, ketones and, alcohols, methyl salicylate, and some as yet unidentifiedknown compounds. Both SSB or and RLF caterpillar infestation dramatically increased the release of the volatiles. Moreover, SSB caterpillar infestation induced the rice plants to release 2heptanonol, (E)-linalool oxide and two unknown chemicals, and RLF infestation elicited the emission of 2-heptanonol,(E)-linalool oxide,methyl salicylate and β-caryophyllene. The comparison showed that compared to SSB caterpillarinfested plants, β-caryophyllene and MeSA were special specific components emitted from RLF caterpillarinfested plants. There were significant differences between SSBinfested and RLF-infested plants in amounts of linalool,α-copaene,(+)-cedrol,n-heptadecane and nnonadecane. It may explain the reason why the volatiles emitted from rice plants infested by SSB or and RLF caterpillar had different effects on the behavior of the natural enemies and herbivores.
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