几种生防药剂对高粱中后期螟虫的防治效果评价

Evaluation on the Control Effect of Several Biological Control Agents on the Borer in the Middle and Later Period of Sorghum

为指导高粱中后期绿色防虫、节本增收,以5种杀虫剂,采用3种施药方式,开展田间药效试验。结果表明:以40 mL·667 m-2心叶喷施0.5%藜芦碱可有效防控高粱中后期螟虫,优于Bt、球孢白僵菌等生防药剂的防虫效果。使用0.5%藜芦碱较使用20%氯虫苯甲酰胺药剂成本高3.45元·667 m-2,但可用于高粱绿色防虫,因此依然是高粱绿色生产防控中后期螟虫的理想药剂。

In order to guide the green pest control,cost saving and income increasing in the middle and later period of sorghum,the field efficacy test was carried out with 5 insecticides and 3 application methods.The results showed that the application of 0.5%veratrine to 40 mL·667 m-2 heart leaves could effectively control the borer in the middle and later stages of sorghum,which was better than the biological control agents such as BT and Beauveria bassiana.The cost of 0.5%veratrine is 3.45 yuan·667 m-2 higher than that of 20%chlorobenzamide,but it can be used in sorghum green pest control,so it is still an ideal agent for the prevention and control of borers in the middle and later stages of sorghum green production.