2013 Fiscal Year Final Research Report

Rice plant compounds regulating infestation behaviors of rice-ear bugs

Research Project

Project/Area Number	23380031
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Applied entomology
Research Institution	Tohoku University
Principal Investigator	HORI Masatoshi 東北大学, (連合)農学研究科(研究院), 准教授 (70372307)
Co-Investigator(Kenkyū-buntansha)	ATSUHIKO Nagasawa 東北大学, 大学院・農学研究科, 助教 (60616431)
Project Period (FY)	2011-04-01 – 2014-03-31
Keywords	害虫 / 斑点米カメムシ / イネ / 水田 / 寄主選択 / 摂食刺激物質 / 誘引物質 / 吸汁行動
Research Abstract	Composition of rice plant volatiles which cause invasion of rice-ear bugs into paddy fields changed during a day as well as rice development. Although both Trigonotylus caelestialium and Stenotus rubrovittatus were nocturnal-diurnal insects, the former was more active in the photophase than in the scotophase and the latter was more active in the scotophase than in the photophase. Therefore, invasion of the bugs into paddy fields may be influenced by changes of volatile composition from rice during a day and diurnal infestation activities of the bugs. In addition, it was suggested that each step of feeding behavior of bugs was regulated by several rice compounds. Therefore, regulating active compounds which play roles in infestation behaviors of the bugs may lead to prevent infestation of rice by the bugs.