美国农业部农业研究中心的专家发现,应用糖和淀粉混合物,能显著地延长某些生物农药的作用时间,从而使其发挥更高的效力。这意味着,对于现在某些作物害虫,有了粘附性较好,药效时间较长、非化合物的溶液。昆虫学家 Michael RMoGuire 和化学家 BaruchS·Shasha 在温室的摸拟降雨试验中发现,用糖、淀粉胶膜包围农药后喷雾,药液粘附在叶片上的时间超过19天,而常规喷雾法仅2—4天。研究人员还发现,在用生物杀虫剂 Bt 防治欧洲玉米螟时,新方法使 Bt 保持高活性的时间超过一个试验周期(8天),杀虫率在90%以上,而常规方法杀虫率仅20%。MoGuire 认为,这一发现说明,我们可以克服以前在大田应用 Bt 所遇到的因阳光和雨水冲刷而 Experts at the Agricultural Research Center at the U.S. Department of Agriculture found that the use of sugar and starch blends can significantly extend the duration of action of certain biopesticides and thereby make them more effective. This means that for some crop pests now, there is a better adhesion, a longer duration of action, and a non-compound solution. Entomologist Michael RMoGuire and chemist Baruchs Shasha found in a simulated rainfall experiment in a greenhouse that pesticides were sprayed on with sugar and starch film and adhered to the leaves for more than 19 days, whereas conventional spray methods only 2-4 days. The researchers also found that when using the biopesticide Bt to control the European corn borer, the new method allowed the Bt to remain hyperactive for more than one test period (8 days) with an insecticidal rate above 90%, whereas conventional methods kill insects Only 20%. According to MoGuire, this finding shows that we can overcome the previous exposure to sunlight and rain while Bt was applied in the field