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应用17 600 IU·mg-1 Bt悬浮剂防治小菜蛾幼虫,结果显示,17 600 IU.mg-1 Bt悬浮剂1 125 g·hm-2的防效为94.36%,高于16 000 IU·mg-1 Bt可湿性粉剂1 125 g·hm-2的防效(85.53%),是防治小菜蛾的有效生物药剂,推荐使用浓度为750～1 125 g·hm-2。
Application of 17 600 IU · mg-1 Bt suspending agent to control Plutella xylostella larvae showed that the control effect of 17 600 IU.mg-1 Bt suspending agent at 1 125 g · hm-2 was 94.36%, higher than 16 000 IU · mg -1 The control efficacy of 1 Bt WP at 1 125 g · hm-2 (85.53%) is an effective biocide against Plutella xylostella. The recommended concentration is 750 ~ 1 125 g · hm-2.