干旱胁迫对棉花上棉蚜种群增长影响的评价方法  

A method for assessing the effects of drought stress on population growth of Aphis gossypii Glover on cotton plants

作　　者：王晨 刘金萍 杨益众 陆宴辉[2] WANG Chen;LIU Jinping;YANG Yizhong;LU Yanhui(College of Plant Protection,Yangzhou University,Yangzhou 225007,China;State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China)

机构地区：[1]扬州大学植物保护学院,扬州225007 [2]中国农业科学院植物保护研究所,植物病虫害生物学国家重点实验室,北京100193

出　　处：《植物保护》2023年第1期193-199,共7页Plant Protection

基　　金：NSFC-新疆联合基金重点支持项目(U2003212);财政部和农业农村部:国家现代农业产业技术体系(CARS-15-19)。

摘　　要：为建立干旱胁迫对棉花害虫种群增长影响的评价方法,本研究设置1%、3%和5%聚乙二醇6000(PEG-6000)溶液处理4叶期棉花苗,分别模拟轻度、中度、重度干旱胁迫,系统测定并比较分析了棉花植株生理特性及棉蚜种群密度。结果显示:随着PEG-6000浓度增加,棉花地上部分生物量和叶片相对含水量逐渐降低,而棉花植株上的棉蚜种群增长能力和平均密度明显下降。分析表明,干旱胁迫不利于棉花植株生长,进而对棉蚜种群增长产生负面影响。本研究为后续系统研究干旱胁迫对棉花-害虫-天敌互作关系的长期影响及其机制奠定了重要基础。To construct a method for assessing the effects of drought stress on population growth of cotton pests,the 4-leaf stage cotton plants were treated by 1%,3%and 5%PEG-6000(polyethylene glycol-6000)to simulate mild,moderate,and severe drought stress to plants,respectively,then the physiological characteristics of plant and the population density of Aphis gossypii on the treated plants were measured and analyzed.The results indicated that the aboveground biomass and leaf relative water content of cotton decreased gradually and the population density of A.gossypii reared on the treated plants decreased significantly with increasing PEG-6000 concentration.We concluded that the growth of cotton was depressed under drought stress,which had a negative effect on growth of A.gossypii population.It lays an important foundation for the following systematic studies on the long-term effects of drought stress on the interactions among cotton plant,pest insects and natural enemies and the underlying mechanisms.

关 键 词：干旱胁迫 棉花 棉蚜 叶片生理代谢 害虫种群增长 

分 类 号：S562[农业科学—作物学] S435.622.1