四种杀虫剂林间防治思茅松毛虫试验

Experiment on controlling Dendrolimus kikuchii Mats by four insecticides in forest

采用4种杀虫剂对思茅松毛虫Dendrolimus kikuchii Mats进行防治试验,结果表明:施用高效氯氰菊脂与溴氰菊脂混合的油烟剂速效性最好,供试虫种在第4天校正死亡率可达100%;白僵菌和林得保粉剂的持效性最好,随施药后时间的延长死亡率增高。思茅松毛虫常规防治中可选用持效期长的白僵菌和林得保粉剂;在密度较大或大面积暴发成灾时,宜选用速效性好的高效氯氰菊脂与溴氰菊脂混合油烟剂进行防治。

The author carried out a control experiment of using four insecticides to kill Dendrolimus kikuchii Mats in forest. The results showed that mixed agents of beta cypermethrin with deltamethyrin had the fastest availability,the corrected mortality rate reached 100% spraying 4 days later. The powders of Beauveria bassiana and Lin Debao had the longest validity, their mortality rate increased as time went on. It was concluded that the powders of Beauveria bassiana and Lin Debao should be used to control D. kikuchii in conventional situations,but when the pest outbroke or it had bigger densities, the mixed agents of beta cypermethrin with deltamethyrin having optimium availibility should be used.