CF1262菌株与3种生物制剂对美国白蛾幼虫毒力试验  

Toxicity test of four biological agents to larvae of Hyphantria cunea

作　　者：仇兆林 孟子翔 徐丽丽[2] 刘云鹏[2] Qiu Zhaolin;Meng Zixiang;Xu Lili;Liu Yunpeng(Jiangsu Lubao Forestry Development Co.,Ltd.,Nanjing 211153,China;Jiangsu Academy of Forestry,Nanjing 211153,China)

机构地区：[1]江苏绿宝林业发展有限公司,江苏南京211153 [2]江苏省林业科学研究院,江苏南京211153

出　　处：《江苏林业科技》2025年第1期9-14,共6页Journal of Jiangsu Forestry Science & Technology

基　　金：江苏省农业科技自主创新资金项目“江苏长江沿岸景观防护林构建与生态修复技术研究”[CX(19)1004]。

摘　　要：生物源杀虫剂的使用是美国白蛾生物防治的重要途径之一。该试验选取实验室优选的苏云金芽孢杆菌(CF1262)与3种生物源药剂对美国白蛾幼虫进行室内毒力测定,并依据各药剂的校正死亡率、累积死亡率、致死浓度(LC50、LC95)和致死中时(LT50、LT95)等指标分析其毒力水平。结果发现,高浓度下4种药剂对美国白蛾幼虫的累积死亡率均在80%以上,其中2 000倍液的阿维菌素和苦参碱48 h累积死亡率达到100%。阿维菌素的致死浓度(LC50)和致死中时(LT50)均最低,表明其对美国白蛾幼虫的毒力较其他3种药剂强。CF1262菌株防治效果能够达到90%,但致死速度相对缓慢,建议与其他药剂复配使用。试验对比不同药剂的致死浓度和致死速度,并量化给出致死浓度(LT50、LC95)和致死中时(LT50、LT95),为美国白蛾幼虫的防治药剂选择和药剂用量提供了参考。The application of biological pesticides is a critical approach for control of Hyphantria cunea.In this trial,the toxicity of Bacillus thuringiensis(CF1262) and three other biological agents against H.cunea larvae was evaluated by using several key indicators,including corrected mortality,cumulative mortality,LC50,LC95,LT50 and LT95.The results demonstrated that all four agents achieved cumulative mortality rates exceeding 80% at high concentrations.Specifically,avermectin(2 000-fold dilution) and matrine(2 000-fold dilution) resulted in 100% cumulative mortality within 48 hours.The LC50 and LT50 values of avermectin were the lowest,indicating its superior toxicity against H.cunea larvae compared with the other three agents.The control effect of the CF1262 strain could reach 90%,but its lethal speed was relatively slow,so recommending use in combination with other chemicals.By comparing lethal concentrations(LC50,LC95) and time-dependent toxicity(LT50,LT95),this study provides a reference for optimizing the selection and dosage of biological agents in practical H.cunea larval control.

关 键 词：美国白蛾 生物杀虫剂 阿维菌素 苦参碱 苏云金芽孢杆菌(CF1262) 毒力测定 

分 类 号：S763.42[农业科学—森林保护学] S767.32[农业科学—林学] S767.37