环境因子对二点委夜蛾微孢子虫侵染能力的影响  

Effects of environmental factors on microsporidian pathogenicity on Athetis lepigone (M?schler)

作　　者：杜立新[1] 曹伟平[1] 张海剑[1] 宋健[1] 焦玉敏 李会然 张晓[3] Du Lixin;Cao Weiping;Zhang Haijian;Song Jian;Jiao Yumin;Li huiran;Zhang Xiao(Institute of Plant Protection, Hebei Aeademy of Agrieultural and Forestry Seienees/IPM Center of Hebei Province/Key I ＂~boratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding Hebei 071000, China;Dingzhou Bureau of Agrieuhure, Dingzhou Hebei 073000, China;Hebei Academy of Agricultural and Forestry Seienees, Shijiazhuang Hebei 050051, China)

机构地区：[1]河北省农林科学院植物保护研究所/河北省农业有害生物综合防治工程技术研究中心,农业部华北北部作物有害生物综合治理重点实验室,河北保定071000 [2]河北省定州市农业局,河北定州073000 [3]河北省农林科学院,河北石家庄050051

出　　处：《中国植保导刊》2018年第6期47-50,共4页China Plant Protection

基　　金：河北省农林科学院生物防治创新团队(F18E10001)

摘　　要：在室内条件下测定了温度、湿度和紫外线对二点委夜蛾微孢子虫存活力及其杀虫效果的影响。结果表明,该微孢子虫的耐受温度范围较宽,存活的临界高温在50~55℃之间。环境湿度对微孢子虫的侵染能力影响显著,相对湿度在75%~84%条件下,微孢子虫对二点委夜蛾幼虫的侵染能力最强,湿度过高或过低都不利于微孢子虫侵染寄主。微孢子虫经紫外照射后,对二点委夜蛾幼虫的侵染能力明显下降,紫外灯照射5 min后对二点委夜蛾幼虫的致死率较未经紫外照射的处理下降了81%。Effects of temperature, humidity and ultraviolet radiation on viability and virulence of the microsporidia of Athetis lepigone were determined in lab. The results showed that tolerance temperature range of microsporidia was relatively wide, and upper limit of the critical temperature for its survival was about 50-55℃. Influence of environmental relativity humidity on pathogenicity of microsporidia was significant, and microsporidia showed the strongest ability to infect A. lepigone larva under condition of relative humidity ranged from 75% to 84%, while too high or too low humidity was a disadvantage for its infection. The ability of microsporidia to infect A. lepigone larva declined significantly by ultraviolet ray treatment and dropped for 81% after 5 minutes ultraviolet ray treatment comparing to the control.

关 键 词：微孢子虫 二点委夜蛾 环境因子 

分 类 号：S476[农业科学—农业昆虫与害虫防治]