7种生物药剂防治烟青虫的田间药效试验

Field experiments of 7 pesticides for controlling Helicoverpa assulta Guene

摘要: 选取7种生物药剂对烟青虫（Helicoverpa assulta Guene)进行了田间药效试验，通过对烟株的抗虫性、烟叶经济性状等进行研究分析，结果表明：各供试药剂均表现良好，参试的7种生物药剂中以8000IU/μL苏云菌杆菌悬浮剂(100g/667m2)和16000 IU/mg苏云金杆菌可湿性粉剂(75 g/667m2)对烟青虫的防效最显著，药效的速效性、持效性接近供试菊酯类化学药剂，是云南文山烟区绿色烟叶生产防治烟青虫的首选生物防治剂。

Abstract: Field experiments of 7 pesticides for controlling Helicoverpa assulta Guene were conducted in tobacco field, the control efficiencies of 7 bio-control agents and their influence on main economic characters of tobacco leaf were studied. The results showed that among the 7 bio-control agents tested, the control effect of 8 000 IU/滋LB.t SC (100 g/667m2)and 16 000 IU/mg Bt Wettable Powders (WP, 75 g/667m2) was significant, closely to the effect of Chrysanthemum Ester Insecticide. The two bio-control agents were the preferable biological agents used to control H. assulta Guene of the green tobacco production in Yunnan.