生物杀虫剂大英雄 ( 10 9PIB/gNPV可湿性粉剂 )和其他对比药剂的田间药效试验表明 :大英雄和 2 .5 % β 氟氯氰菊酯的配合使用对棉铃虫有很好的防效 ,且药效保持在 80 %以上能持续 7d以上 A field efficacy trial of a biocidal big hero (10 9 PIB / g NPV wettable powder) and other comparative agents showed that a combination of a hero and 2.5% beta cypermethrin had a good control effect against H. armigera and Efficacy maintained at above 80% for more than 7d