3种杀虫剂单剂及其混配对茴香薄翅野螟幼虫的毒力测定  

The toxicity of three pesticides and their mixture for larvae of Evergestis extimalis Scopoli

作　　者：王一鸣[1] 来有鹏[2] 郭青云[2] WANG Yiming LAI Youpeng GUO Qingyun(Qinghai University,Xining 810016 , China Academy of Agriculture and Forestry ,qinghai University,Key Laboratory of Integrated Pest Management, Xining 810016, QINGHAI, China)

机构地区：[1]青海大学,青海西宁810016 [2]青海大学农林科学院,农业部西宁作物有害生物科学观测实验站,青海省农业有害生物综合治理重点实验室,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2017年第3期14-18,共5页Journal of Qinghai University(Natural Science)

基　　金：国家公益性行业(农业)科研专项(201203038)

摘　　要：为了明确3种常用农药及其混配对茴香薄翅野螟幼虫的毒力。采用胃毒法,室内测定3种农药的LC_(50)及3种混配药剂的共毒系数。结果表明:在处理24 h之后,阿维菌素+高效氯氰菊酯(0.31+0.74)mg/L和阿维菌素+毒死蜱(0.31+0.42)mg/L两个配比对茴香薄翅野螟幼虫的毒力均呈现出增效作用,共毒系数分别为302.34和441.73,其中阿维菌素+毒死蜱的配比增效作用最大。高效氯氰菊酯+毒死蜱(0.74+0.42)mg/L配比对茴香薄翅膀野螟的毒力呈现拮抗作用,共毒系数仅为1.19。在处理48 h之后,阿维菌素+高效氯氰菊酯、阿维菌素+毒死蜱和高效氯氰菊酯+毒死蜱3个配比对茴香薄翅野螟幼虫的毒力均呈现出增效作用,共毒系数分别为644.08,155.21和239.58,其中阿维菌素+高效氯氰菊酯配比增效作用最大,说明这两种药剂混配在生产中防治该虫效果较好值得推广。In order to define the toxicity of avermectins, beta cypermethrin and chlorpyrifos and their mixture for larvae of Evergestis extimalis Scopoli, the co - toxicity of three pesticides was tested by stomach poisoning method. The results showed that avermectins mixed with beta cypermethrin （0. 31 ＋0. 74） mg/L or chlorpyrifos（0. 31 ＋ 0. 42 ） mg/L had remarkable synergistic effect after 24 h, with the co - toxicity coefficient of 302. 34 and 441.73, respectively. The beta cypermethrin mixed with chlorpyrifos（0. 74 ＋0. 42） mg/L had antagonistic effect, with the co - toxicity coefficient of 1. 19. The avermectins mixed with beta cypermethrin or chlorpyrifos, beta cypermethrin mixed with chlorpyrifos had synergistic effect after 48 h, with the co - toxiticy coefficient of 644. 08 , 155. 21 and 239. 58, respectively. The result shows that avermectins mixed with beta cypermethrin is very effective.

关 键 词：茴香薄翅野螟 杀虫剂 混配 毒力测定 

分 类 号：S432.16[农业科学—植物病理学]