螺虫乙酯对B型烟粉虱毒力及部分生物学参数的影响  

Toxicity of spirotetramat to Bemisia tabaci biotype B andthe impacton the biological parameters

作　　者：戈大庆[1] 姜兴印[1] 王燕[1] 李俊虎[1] 段强[1] 

机构地区：[1]山东农业大学植物保护学院,泰安271018

出　　处：《植物保护学报》2011年第4期351-356,共6页Journal of Plant Protection

基　　金："十一五"科技支撑计划(2006BAK02A23)

摘　　要：为系统评价新药剂螺虫乙酯(spirotetramat)对B型烟粉虱(Bem isia tabacibiotype B)的生物活性及生物学参数的影响,采用浸渍法测定了螺虫乙酯及对照药剂吡虫啉对B型烟粉虱各个虫态的室内毒力、成虫寿命、产卵量及所产卵孵化率的影响。结果表明,螺虫乙酯对2龄若虫毒力最高,LC50为4.07mg/L,为吡虫啉的2.73倍,对卵及成虫毒力较低,且显著低于吡虫啉;12.5 mg/L螺虫乙酯处理后,成虫寿命为17.3天,较空白对照显著缩短,吡虫啉与空白对照无显著差异;12.5mg/L螺虫乙酯处理后平均产卵量为5.0粒,所产卵的平均孵化率为3.23%,显著低于空白对照和吡虫啉处理,吡虫啉与空白对照无显著差异;100 mg/L螺虫乙酯处理24 h后对烟粉虱成虫驱避率为52%,驱避效果较差。In order to value the bioactivity and impact on the biology of spirotetramat against Bemisia tabaci biotype B, the toxicity of spirotetramat and imidacloprid （control agent） to different instar nymphs of B. tabaci biotype B and the effects of the longevity, fecundity and eggs hatchability were measured in the laboratory by using egg-dipping and leaf-dipping. The toxicity of the 2nd instar nymph is high after treatment by spirotetramat, the LCso was 4.07 mg/L, it was 2.73 times to the toxicity of imidacloprid, toxicity was low to the eggs and adults, and lower than that of imidacloprid. Longevity of the B. tabaci biotype B was 17.3 days after treatment with 12.5 mg/L spirotetramat, it was significantly shorted compared with the contrast experiment （treatment without pesticides）, while imidacloprid was insignificant. The fecundity was 5 and the eggs hatching rate was 3.23% after treatment with 12.5 mg/L spirotetramat, which has significantly inhibition to the fecundity and the eggs hatching, and it was significantly lower than those treated with imidacloprid and the contrast experiment. It was no significant differences between imidacloprid and the contrast experiment. The repellent action was 52% to the adults of spirotetramat after 24 h treated with 100 mg/L spirotetramat, and the repellent action was not very good.

关 键 词：螺虫乙酯 B型烟粉虱 毒力 生物学参数 驱避作用 

分 类 号：S433[农业科学—农业昆虫与害虫防治]