摘要
采用食下毒叶法测定哒螨灵、炔螨特、溴虫腈、敌敌畏、辛硫磷和吡虫啉6种常用杀虫杀螨剂对家蚕的毒力,并研究炔螨特、溴虫腈、敌敌畏和吡虫啉4种杀虫剂的2种亚致死剂量(LC5、LC15)对家蚕生长发育的影响,为蚕区桑园害虫防治选择对家蚕安全的杀虫剂提供参考。结果表明,6种杀虫剂对家蚕的毒力大小依次为吡虫啉>辛硫磷>敌敌畏>哒螨灵>溴虫腈>炔螨特,其对家蚕96 h的LC50分别为0.256、0.556、8.912、50.689、119.715、351.691 mg/L,毒力皆随着时间的累积而增加;炔螨特、溴虫腈、敌敌畏3种杀虫剂的LC5、LC152种亚致死剂量对存活家蚕幼虫的历期、眠蚕体质量、全茧量和茧层量与对照相比无明显差异,且相同药剂不同亚致死剂量间对家蚕的影响差异不显著。
In order to provide reference for choosing safe pesticides in controlling pests in mulberry gardens of silkworm （Bombyx mori） raising area, the toxicity of 6 common pesticides, namely pyridaben, propargite, chlorfenapyr, DDVP, phoxim and imidacloprid, to silkworm was assayed through feeding the larvae with poisoned leaves, and the effect of two sublethal dosages （ LCsand LC15 ） of 4 pesticides, namely propargite, chlorfenapyr, DDVP and imidacloprid, to silkworm growth and development was investigated. The results indicated that the toxicity of pesticides to the silkworm larvae were in the order of imidacloprid 〉 phoxim 〉 DDVP 〉 pyridaben 〉 chlorfenapyr 〉 propargite. Their LCso to silkworm at 96 h after treatment was 0. 256, 0. 556, 8. 912, 50. 689, 119. 715 and 351. 691 mg/L, respectively. And the toxicity increased with the prolongation of time. The developmental stages, body weight of molting larvae, cocoon weight and cocoon shell weight of survived larvae from treatments at LCS and LC15 of propargite, chlorfenapyr and DDVP showed no significant difference compared with the control. Moreover, no significant difference was observed between treatments at LCs and LC15 of the same pesticide.
出处
《蚕业科学》
CAS
CSCD
北大核心
2011年第1期142-146,共5页
ACTA SERICOLOGICA SINICA
基金
云南省自然科学基金项目(No.2010ZC170)
现代农业产业技术体系建设专项(蚕桑)
关键词
杀虫剂
毒力
亚致死效应
家蚕
Pesticide
Toxicity
Sublethal effect
Bombyx mori
