| Title: | Electrophysiological and Behavioral Responses of Drosophila suzukii (Diptera: Drosophilidae) Towards the Leaf Volatile beta-cyclocitral and Selected Fruit-Ripening Volatiles |
| Author(s): | Bolton LG; Pinero JC; Barrett BA; |
| Address: | "Division of Plant Sciences, University of Missouri, Columbia, MO. Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA" |
| ISSN/ISBN: | 1938-2936 (Electronic) 0046-225X (Linking) |
| Abstract: | "The spotted-wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), is attracted to numerous volatile organic compounds (VOCs) emitted from several ripening, small fruit crops. However, the strawberry leaf terpenoid, beta-cyclocitral, is reportedly very attractive to D. suzukii (but not to all Drosophila spp.). This suggests that leaf and fruit VOCs may be critical sources needed to further develop a more species-specific D. suzukii monitoring lure, or semiochemically based attract-and-kill systems. This study investigated the electrophysiological responses of male and female D. suzukii towards selected host fruit-ripening VOCs and beta-cyclocitral, along with behavioral responses toward combined fruit VOCs with beta-cyclocitral. Electroantennogram (EAG) results revealed a positive dose-response, for both sexes, as concentrations increased for all VOCs tested. For beta-cyclocitral, hexyl acetate and methyl butyrate, the mean male EAG responses were significantly greater than the female responses at lower doses. In caged behavioral bioassays, only in the beta-cyclocitral treatments were the mean number of flies captured (sexes combined) significantly greater than that captured in solvent (mineral oil) controls. Our study has demonstrated that while single fruit-based VOCs alone are not enough to cause a strong behavioral attraction by both male and female D. suzukii, the addition of beta-cyclocitral did produce a significant attraction response from both sexes. In both bioassays, males had higher responses to beta-cyclocitral than females, which suggest a greater sensitivity to this compound. Further studies are needed to ascertain the role beta-cyclocitral may play in the development of a more species-specific D. suzukii monitoring lure" |
| Keywords: | Aldehydes Animals *Diterpenes *Drosophila Female Fruit Insect Control Male attractant bioassay electroantennogram spotted-wing drosophila; |
| Notes: | "MedlineBolton, L Grant Pinero, Jaime C Barrett, Bruce A eng Research Support, U.S. Gov't, Non-P.H.S. England 2019/08/23 Environ Entomol. 2019 Sep 30; 48(5):1049-1055. doi: 10.1093/ee/nvz092" |
