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在鄂西北高山地区,采用喷雾法进行高含量苏云金杆菌(Bacillus thuringiensis)制剂(50 000 IU/mg可湿性粉剂,晶体蛋白含量为8.3%)防治小菜蛾的田间药效试验。试验结果表明,50 000 IU/mg苏云金杆菌可湿性粉剂对小菜蛾防效显著,药后7 d防效达到91.0%~95.9%,优于对照药剂1.8%阿维菌素乳油。苏云金杆菌作为一种全球公认的低毒、环保、安全生物农药,50 000 IU/mg苏云金杆菌可湿性粉剂可以在高山十字花科蔬菜种植区大面积推广,推荐使用剂量675~900 g/hm2。
In the high mountainous area of northwestern Hubei, a spray test was conducted to determine the efficacy of Bacillus thuringiensis (50 000 IU / mg wettable powder, crystal protein content 8.3%) against Plutella xylostella. The test results showed that 50 000 IU / mg Bacillus thuringiensis wettable powder on Plutella xylostella significant effect, 7 d after the drug control effect of 91.0% to 95.9%, better than the control agent 1.8% abamectin EC. Bacillus thuringiensis as a globally recognized low toxicity, environmental protection, safety bio-pesticides, 50 000 IU / mg Bacillus thuringiensis wettable powder can be large-scale promotion in the cruciferous vegetable planting area, the recommended dosage of 675 ~ 900 g / hm2.