| Title: | "Electrophysiological and behavioral responses of female African rice gall midge, Orseolia oryzivora Harris and Gagne, to host plant volatiles" |
| Author(s): | Ogah EO; Smart LE; Woodcock CM; Caulfield JC; Birkett MA; Pickett JA; Nwilene FE; Bruce TJ; |
| Address: | "Department of Crop Production and Landscape Management, Ebonyi State University, Abakaliki, Nigeria. Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, UK. Africa Rice Centre, IITA, Ibadan, Nigeria. Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, UK. toby.bruce@rothamsted.ac.uk" |
| DOI: | 10.1007/s10886-016-0788-6 |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "African rice gall midge, Orseolia oryzivora Harris and Gagne, is a major pest of rice in Africa. Depsite its economic importance, its chemical ecology is not well understood. Here, we assessed behavioral and electrophysiological responses of O. oryzivora to host plant volatiles. In olfactometer bioassays, mated female O. oryzivora were attracted to volatiles emitted from intact rice plants but were repelled by volatiles collected from plants infested by conspecifics. In a choice test, there was a preference for volatiles from uninfested plants over those from infested plants. Coupled gas chromatography-electroantennography analyses of panicle volatiles isolated four electrophysiologically active components: (S)-linalool, 4,8-dimethyl-1,3,7-nonatriene, (E)-caryophyllene, and (R/S)-(E)-nerolidol. A synthetic blend of volatiles at the same concentration and ratio as that from an intact plant was attractive to mated females, whereas a blend based on the ratio of volatiles from an infested plant was repellent. This suggests that O. oryzivora uses olfaction for host plant recognition. The identification of blends of volatiles emitted by plants that can both attract and repel O. oryzivora may aid the development of sustainable control measures" |
| Keywords: | "Acyclic Monoterpenes Animals Behavior, Animal Diptera/*physiology Electrophysiological Phenomena Female Gas Chromatography-Mass Spectrometry *Host-Parasite Interactions Monoterpenes/analysis Odorants/analysis Olfactometry Oryza/*chemistry/parasitology Pol;" |
| Notes: | "MedlineOgah, Emmanuel O Smart, Lesley E Woodcock, Christine M Caulfield, John C Birkett, Michael A Pickett, John A Nwilene, Francis E Bruce, Toby J eng 2016/11/07 J Chem Ecol. 2017 Jan; 43(1):13-16. doi: 10.1007/s10886-016-0788-6. Epub 2016 Nov 4" |
