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应用生态学报 ›› 2017, Vol. 28 ›› Issue (11): 3784-3788.doi: 10.13287/j.1001-9332.201711.036

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温度对二化螟性信息素通讯的影响

余棋, 闫祺, 董双林*   

  1. 南京农业大学植物保护学院/农作物生物灾害综合治理教育部重点实验室, 南京 210095
  • 出版日期:2017-11-18 发布日期:2017-11-18
  • 通讯作者: *mail:sldong@njau.edu.cn
  • 作者简介:余棋, 男, 1991年生, 硕士研究生.主要从事昆虫化学生态学研究.E-mail:yqmyslef@126.com
  • 基金资助:
    本文由公益性行业(农业)科研专项(201303017)和国家自然科学基金项目(31372264)资助

Effect of temperature on the sex pheromone communication of Chilo suppressalis Walker (Lepidoptera: Pyralidae)

YU Qi, YAN Qi, DONG Shuang-lin*   

  1. College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, China
  • Online:2017-11-18 Published:2017-11-18
  • Contact: *mail:sldong@njau.edu.cn
  • Supported by:
    This work was supported by the Special Fund for Agro-scientific Research in the Public Interest (201303017) and National Natural Science Foundation of China (31372264)

摘要: 环境因素影响昆虫两性间的化学通讯,也影响性信息素技术的田间防治效果.本文探讨了温度对二化螟雌蛾性信息素产生以及雄蛾对性信息素触角电位反应的影响,以期为田间二化螟的性信息素防治提供指导.在二化螟蛹期和成虫期进行不同温度处理(15、20、25、30和35 ℃),然后利用气相色谱仪(GC)分析雌蛾性腺内各性信息素组分的含量及比例,同时利用触角电位仪(EAG)测定雄蛾对性信息素组分的电生理反应.结果表明: 25 ℃处理中雌蛾性腺内3个性信息素组分(Z9-16:Ald、Z11-16:Ald和Z13-18:Ald)的含量均显著高于其他温度处理(15、20和30 ℃),且25 ℃处理中Z13-18:Ald的相对比例也显著低于其他温度处理.就雄蛾对性信息素的敏感性而言,对3种性信息素单一组分及特定比例混合物的EAG反应在15~25 ℃间没有显著差异,但在25~35 ℃间(Z13-18:Ald在30~35 ℃间)随温度升高呈下降趋势,且30 ℃较25 ℃显著降低,35 ℃较30 ℃又显著降低.综合分析认为,二化螟性信息素通讯的适宜温度为20~25 ℃,温度过高或过低均不利于二化螟两性间的正常化学通讯.研究结果为二化螟性信息素防治技术的合理应用及极端温度条件下害虫种群发生的预测预报,提供了重要参考.

Abstract: Environmental factors affect the insect sex pheromone communication, and subsequently the attractiveness of sex pheromone lures used in pest control. In order to provide the guidance for the sex pheromone use in control of Chilo suppressalis, effects of temperature on the sex pheromone production in female moths and electro-physiological response of male moths to sex pheromones, were explored in our present study. The insects were treated with different temperatures (15, 20, 25, 30 and 35 ℃) at pupa and adult stages, then the contents and relative proportion of each of three pheromone components were determined by a gas chromatography (GC), and the electro-physiological response to sex pheromones were detected by an electroantennograph (EAG). Results showed that the contents of all three sex pheromone components (Z9-16:Ald, Z11-16:Ald and Z13-18:Ald) were highest in 25 ℃ treated females, significantly higher than those in other temperature treated females, and the relative proportion of Z13-18:Ald was significantly reduced in 25 ℃ treated females. On the male part, EAG responses to each of the three sex pheromone components and the tertiary blend showed no significant difference at temperatures between 15-25 ℃, but EAG va-lues decreased significantly as the temperature increased to 30 ℃ and further to 35 ℃ for component Z9-16:Ald, Z11-16:Ald and the blend, and to 35 ℃ for Z13-18:Ald. Taken together, the optimum temperature for the sex pheromone communication was 20-25 ℃ in C. suppressalis, and too higher or lower temperature will affect the normal communication. The study provided an important reference for the use of sex pheromone in pest control, and for prediction of the development of pest population at extremely low or high temperature.