摘要
[目的]筛选对枸杞木虱高效且对天敌低毒的生物药剂。[方法]在室内进行多种生物药剂对枸杞木虱的药效试验,并进行天敌敏感性试验,筛选对枸杞木虱高效且对天敌低毒的生物药剂。[结果]生物药剂中印楝素毒力最大,LD50为0.16 mg/L,其次为黎芦碱、苦参碱、绿僵菌、烟碱、鱼藤酮、Bt;烟碱毒力较差。天敌敏感性试验结果表明,生物药剂中,多异瓢虫对印楝素的敏感性最大,浓度为3.00mg/L时,多异瓢虫死亡率达88.92%,其次为苦参碱和黎芦碱;多异瓢虫对烟碱和鱼藤酮较不敏感。[结论]印楝素、黎芦碱、苦参碱、绿僵菌等生物药剂对枸杞木虱有良好的毒杀效果,但印楝素对天敌的杀伤作用较大,生产实践中应合理选用。
[Objective] The biological insecticide with high efficiency on major insects of the Lycium chinensis and low toxicity to natural enemy was selected.[Method] The experiment in the effect of biological insecticides on Paratrioza sinica Yang & Li and the sensitivity to natural enemy was conducted in laboratory.[Result] The results showed that the toxicity of azadirachtin in the biological insecticide was the highest(LD50 of 0.16mg/L);then,followed by veratryl alkali,matrine,metarhizium anisopliae,nicotine,rotenone and Bt;and nicotine,with less toxicity.The results sensitivity-testing of the natural enemy to biological agents showed that the sensitivity of ladybug to azadirachtin was largest and in the concentration of 3.00 mg/L and the many(88.92%) of ladybug were dead;then,oxymatrine and alkali veratryl;and less sensitivity to nicotine and rotenone.[Conclusion] The biological agents such as azadirachtin,veratryl alkali,matrine and metarhizium anisopliae had a good poisoning effect on Lycium chinensis,but the azadirachtin had a larger effect on natural enemy-killing,and thus,the reasonable choice of its application in practice should be paid attention to.
出处
《安徽农业科学》
CAS
北大核心
2009年第10期4541-4542,共2页
Journal of Anhui Agricultural Sciences
基金
中国农业科学院资助项目
关键词
生物药剂
毒力
敏感性
筛选
Biological agent
Toxicity,Sensitivity
Screening