印楝素和银杏酚酸对甜菜夜蛾幼虫的协同增效作用  

Synergism of Azadirachtin and Ginkgolic Acids against Larvae of Spodoptera exigua (Hübner)

作　　者：金党琴[1] 龚爱琴[1] 

机构地区：[1]扬州工业职业技术学院,江苏扬州225127

出　　处：《西北农业学报》2017年第9期1402-1406,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：扬州市重点研发计划(YZ2015030);江苏省青蓝工程[苏教师(2014)23号];扬州工业职业技术学院校级重点课题(2015XK01);江苏省高校自然科学基金(16KJB150044);江苏省大学生实践创新项目(201613754008Y);江苏省高等学校优秀科技创新团队(2017-6);江苏省第5期"333高层次人才培养工程"(苏人才[2016]7号;BRA2017479)~~

摘　　要：研究印楝素和银杏酚酸复配对甜菜夜蛾幼虫的协同增效作用,为开发植物源农药提供理论依据。用印楝素和银杏酚酸及其复配混剂对甜菜夜蛾2龄幼虫进行室内毒力和拒食活性测定,筛选对甜菜夜蛾高效低毒的药剂。结果表明,印楝素和银杏酚酸复配质量比为6∶2,对甜菜夜蛾2龄幼虫具有明显的协同增效作用,2d后的致死中质量浓度(LC_(50))为20.31mg/L,共毒系数为295.36;当印楝素和银杏酚酸复配质量比为3∶5时,拒食活性测定共毒系数为225.22,AFC_(50)为27.03mg/L,增效作用最强。The research aimed to determine the common-toxicity of the mixture of azadirachtin and ginkgolic acids and provide theoretical basis for developing natural pesticides.The toxicity and antifeeding of azadirachtin and ginkgolic acids and their admixture against the 2nd-instar larvae of Spodoptera exigua（Hübner）were conducted in laboratory.The results showed that azadirachtin and ginkgolic acids enhanced their toxicity with each other.The results showed that a mass ratio 6∶2 mixture of azadirachtin and ginkgolic acids was the most synergetic stomach poison with a co-toxicity coefficient of 295.36 two days later.Under this condition,the admixture had the most synergistic effect.The LC_（50） was 20.31 mg/L for up to 2d.The admixture produced amaximum anti-feeding effect and the AFC_（50） was 27.03mg/L when the admixture was blended with ginkgolic acids and azadirachtin at the mass ratio of 3∶5,and the most synergetic effect was detected with a co-toxicity coefficient of 225.22.

关 键 词：印楝素 银杏酚酸 甜菜夜蛾 增效作用 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]