3种无公害药剂防治蒙古栎害虫柞褐叶螟的药效试验

Control Effect Test of Three Non-pollution Medicaments on Sybrida fasciata Butler of Quercus mongolica

[目的]筛选防治蒙古栎害虫柞褐叶螟最有效的药剂和最经济用药量。[方法]选用3种生物杀虫剂进行蒙古栎柞褐叶螟的防治试验,比较不同药剂和不同剂量的防控效果。[结果]3种生物药剂均能在一定程度上控制蒙古栎柞褐叶螟的为害,但不同药剂不同剂量间杀虫效果存在差别。[结论]1.8%阿维菌素EC起效快、持效期长,是蒙古栎林害虫大面积发生时的首选药剂;8000IU苏云金杆菌起效慢,但有很好的防控效果;25%灭幼脲SC防效较差。

[Aims] This study aims to screen out the most effective medicaments and the most economical dosage to control the pest of Sybridafasciata Butler in Quercus mongolica. [Methods] The experiments on control of S. fasciata Butler with three non-pollution medicaments were conducted to compare the effects of different medicaments and dosage. [Results] All these three kinds of biological medicaments can control S. fasciata Butler in Q. mongolica, but the controlling effects are different fxom medicaments and dosage to medicaments and dosage. [Conclusions] The results indicated that control effects of avermectin 1.8% EC are faster than 8000IU Bacillus thuringiensis and chlorbenzuron 25% SC, it was the first choice for the pest occurrence of lage areas; the effects of 8000IU B. thuringiensis were slow but very good; while the effects of chlorbenzuron 25% SC were poor.