Analysis of sex pheromone production and field trapping of the Asian corn borer (OstriniafurnacalisGuenée) in Xinjiang,China |
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| Authors: | DENG Jian-yu LAN Chen-yi-hang ZHOU Jun-xiang YAO Yu-bo YIN Xiao-hui FU Kai-yun DING Xin-hua GUO Wen-chao LIU Wen WANG Na Fumin WANG |
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| Institution: | 1. The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province/Department of Plant Protection, Advanced College of Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, P.R.China;2. Key Laboratory of Integrated Pest Management on Crops in Northwestern Oasis, Ministry of Agriculture and Rural Affairs/Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P.R.China;3. Agricultural Technology Extension Center of Yining County, Yining 835000, P.R.China;4. Division of Plant and Soil Sciences, Davis College of Agriculture, Natural Resources and Design, West Virginia University, Morgantown 26506, USA |
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| Abstract: | Identifying the sex pheromone systems of local pest populations facilitates their management, especially for moth species that show significant geographic variation in sex pheromone communication. We investigated the pheromone production and behavioral responses of the Asian corn borer (Ostrinia furnacalis Guenée; ACB) in Xinjiang, China. The ACB produces three compounds: (Z)-12-tetradecenyl acetate (Z12-14:Ac) and (E)-12-tetradecenyl acetate (E12-14:Ac) which are two sex pheromone compounds, and n-tetradecyl acetate (14:Ac) which has variable roles in mediating behavioral responses. The ratios of these three compounds produced in female gland are geographically distinct among different populations. Quantitative analysis of pheromone production showed that the proportions of Z12-14:Ac in the E/Z isomers (i.e., Z and E12-14:Ac) and the proportions of 14:Ac in the ternary blend respectively averaged 60.46% (SD=5.26) and 25.00% (SD=7.37), with their probabilities normally or near-normally distributed. Trapping experiments in a cornfield indicated that deploying the E/Z isomers and the three compounds in rubber septa close to their gland ratios yielded the most captured males, while other ratios that deviated from the gland ratios showed reduced field captures. The ternary blend was significantly more attractive to males than the E/Z isomers in the field, indicating a functional role of 14:Ac as the third pheromone component used by the local population. Additionally, the dose-response test demonstrated that the application of the three compounds at dosages between 200 and 350 μg attracted significantly more males compared to other dosages. Therefore, the characterization of this local ACB pheromone system provides additional information about its geographic variation and serves as a basis for optimizing the pheromone-mediated control of this pest in Xinjiang. |
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| Keywords: | geographic variation Asian corn borer sex pheromone pheromone titer field trapping |
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