The population structure and sex ratios of Bursaphelenchus xylophilus under a-pinene stress  

作　　者：Jing Cui Yong-Xia Li Wei Zhang Xuan Wang Long Pan Yu-Qian Feng Xing-Yao Zhang 

机构地区：[1]Research Institute of Forestry New Technology,Chinese Academy of Forestry,Beijing 100091,People’s Republic of China [2]Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,People’s Republic of China

出　　处：《Journal of Forestry Research》2020年第3期921-926,共6页林业研究（英文版）

基　　金：financially supported by Fundamental Research Funds of Research Institute of Forest New Technology,CAF(CAFYBB2018SY037);National Key Research and Development Program(2016YFC1200604)。

摘　　要：Pine wood nematode(PWN), Bursaphelenchus xylophilus, is a serious pathogen of pines throughout the world. Previous work indicated that different concentrations of a-pinene could affect nematode reproduction,however the mechanism of that influence is not clear. In order to examine the reproductive strategies of PWN in response to the stress of the volatile material a-pinene, we investigated different aspects of population changes of B.xylophilus under two concentrations of a-pinene. The results show that a high concentration(214.5 mg ml-1)promoted population growth while a low concentration(56.33 mg ml-1) decreased the population. Population structure was analyzed and it was found that a high concentration of a-pinene decreased the percentage of adults but increased the percentages of larvae and eggs.Furthermore, from the results of an evaluation of sex ratios(female/male), it was determined that a high concentration could elevate sex ratios but a low concentration decreased ratios sharply. These results suggest that the PWN could regulate its population by changing sex ratios under stress of a-pinene. This study has provided a theoretical basis for the prevention and control of pine wilt disease caused by the pine wood nematode.

关 键 词：PINE WOOD NEMATODE Α-PINENE Population structure SEX ratios 

分 类 号：S763.18[农业科学—森林保护学]