灭幼脲1号防治松毛虫的研究(一)——室内生物测定

›› 1985, Vol. 21 ›› Issue (3): 241-246.

灭幼脲1号防治松毛虫的研究(一)——室内生物测定

宋长义李镇宇黄吉勇

北京林学院

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1985-08-25 发布日期:1985-08-25

STUDIES ON THE CONTROL OF PINE CATERPILLARS WITH DIFLUBENZURON I .LABORATORY TESTS

Song Changyi,Li Zhenyu,Huang Jiyong

Beijing College of Forestry

Received:1900-01-01 Revised:1900-01-01 Online:1985-08-25 Published:1985-08-25

摘要/Abstract

摘要： 本试验研究了灭幼脲1号对油松毛虫的毒力、幼虫的中毒死亡症状、松毛虫取食量及其对松毛虫幼虫期寄生天敌的影响。结果表明,灭幼脲1号对松毛虫的胃毒作用很强,LC₍₅₀₎在2—9ppm之间(4—5龄幼虫);主要作用方式是影响昆虫的脱皮变态;用灭幼脲处理的幼虫,前4天的食叶量没有明显变化,以后食量下降明显;对松毛虫幼虫期的两种主要寄生天敌——松毛虫狭颊寄蝇和黑侧沟姬蜂的影响不大。可望作为松毛虫综合防治的主要措施之一。

Abstract: Laboratory tests were conducted to evaluate the toxicity of Diflube nzuron to pine caterpillars (Dendrolimus tabulaeformis) and (Dendrolimus spectabilis).Symptoms of poisoning and amount of food taking by the larvae were observed,also the effects on the natural enemies of the pine caterpillar were recorded.The acute oral LC₍₅₀₎ of Diflubenzuron to the 4th and 5th instar larvae is about 2—9ppm.The chief effect of the toxicant is the disruption of the molting process.Effected larvae are normal in food taking in the first 4 days,but the amount of food taken is greatly reduced after the 4th day.The effect of Diflubenzuron to two species of natural enemies of pine caterpillar-Corcelia rasella Boranoff (Tachinidae) and Casinaria nigripes Gravenhorst(Ichneumonidae) is slight.

宋长义李镇宇黄吉勇. 灭幼脲1号防治松毛虫的研究(一)——室内生物测定[J]. , 1985, 21(3): 241-246.

Song Changyi;Li Zhenyu;Huang Jiyong. STUDIES ON THE CONTROL OF PINE CATERPILLARS WITH DIFLUBENZURON I .LABORATORY TESTS[J]. , 1985, 21(3): 241-246.