三种生物农药对油茶考氏白盾蚧室内毒力测定及田间药效评价  

Laboratory toxicity tests and field trials of three biopesticides to Pseudaulacaspis cockerelli on Camellia oleifera

作　　者：胡君 王兰英 郭宗芳 谢再成 HU Jun, et al.(Ganzhou Institute of Forestry, Ganzhou 341000, Chin)

机构地区：[1]赣州市林业科学研究所,江西赣州341000

出　　处：《中国森林病虫》2018年第2期51-53,共3页Forest Pest and Disease

基　　金：赣南油茶产业开发协同创新中心PI项目"赣南油茶林健康经营关键技术研究"(YP201601)

摘　　要：采用浸虫法测试了多杀霉素、甲氨基阿维菌素苯甲酸盐和苏云金芽孢杆菌3种生物杀虫剂对油茶考氏白盾蚧Pseudaulacaspis cockerelli的室内毒力,并进行了田间药效试验。结果表明:3种生物农药48 h的致死中浓度(LC_(50))分别为2.40,4.60,31.18 mg/L;多杀霉素的田间药效最高,1 500倍液10 d的防效达94.38%,其次为甲维盐79.67%和苏云金芽孢杆菌64.83%。相比于化学杀虫剂,多杀霉素与毒死蜱的防效相当,故可作为有效防治油茶考氏白盾蚧的药剂。The laboratory toxicity and field control efficacy of three biopesticides to Pseudaulacaspis cockerelli on Camellia oleifera were studied. The results showed that the 48 h median lethal concentration（LC50） values of spinosad,emamectin benzoate,b acillus thuringiensis to P. cockerelli were 2. 40,4. 60, 31. 18 mg/L respectively. The field efficacy trials indicated that the efficacy after 10 days treatment with spinosad dilution 1 500 times against P. cockerelli was 94. 38% being the highest insecticidal activity,f ollowed by emamectin benzoate and bacillus thuringiensis with efficacy of 79. 67% and64. 83%. The field control efficacy of three biopesticides was consistent with the toxicity bioassay. Moreover,the similarity of field efficacy between spinosad and chlorpyrifos showed that the spinosad could provide an effective alternative to control P. cockerelli.

关 键 词：油茶 考氏白盾蚧 生物农药 毒力测定 田间药效 

分 类 号：S763.42[农业科学—森林保护学]