3种生物农药对西藏飞蝗的防治效果

西藏飞蝗是川西北草原主要的生物灾害之一,近年来平均危害面积在7.5万hm2左右,且呈现出逐年加重趋势。为加大对西藏飞蝗的防治力度,试验应用瑞·苏生防剂、2%阿维·苏云菌可湿性粉剂、1%苦参碱可溶液剂3种生物农药分别对西藏飞蝗进行小区和大面积防治试验,比较3种生物药剂的防治效果。结果表明,3种生物农药对西藏飞蝗的小区试验防治效果在89.99%~92.12%之间,大面积防治效果在86.50%~92.41%之间,均具有较高的防效,可作为防治川西草原西藏飞蝗的选用药剂。

Control efficacy of three biological pesticides on Locusta migratoria tibetensis

Locusta migratoria tibetensis is one of the main biological disasters in northwest Sichuan grassland. During the past years, the annual damaged grassland area was 75 thousand hectares, and presents the increasing trend year by year. In order to effectively control L.migratoria tibetensis, three biological pesticides were used for controlling L.migratoria tibetensis by plot experiments and large area field trials. The control efficacies of the three biological pesticides are 89.99%-92.12% and 86.50%-92.41% in plot experiments and field trials, respectively, which indicates that the three biological pesticides all can be used for controlling L.migratoria tibetensis.