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粉尘法施药技术在我国保护地蔬菜病虫害防治中已得到推广应用。为了从理论上进一步说明粉尘法施药技术的可行性,研究了施药前后棚膜透光率和作物光合速率的变化,采用荧光指示剂法测定了粉尘法施药和常规大容量喷雾技术对操作者的污染程度,测定了药剂在黄瓜和地表的沉积分布。结果表明,粉尘法施药前后棚膜透光率没有变化;作物叶片的光合速率变化很小;处理67m~2棚室,粉尘法施药后药剂在操作者身体上的沉积量是0.21μg/cm~2,大容量喷雾法则高达5.70μg/cm~2,粉尘法对操作者较安全;粉尘法施药后药剂在黄瓜植株上沉积均匀,地表沉积率只有27.6％,农药有效利用率高达70％以上。说明粉尘法施药技术适合于在温室大棚中使用。
Dust law application of pesticides in our protected vegetable pests and diseases prevention and control has been popularized and applied. In order to further explain the feasibility of applying dust technology in theory, the changes of light transmittance and crop photosynthesis rate before and after spraying were studied. The effects of dust application and conventional high-volume spray technology The degree of contamination of the operator, the determination of the agent in the cucumber and the surface sediment distribution. The results showed that there was no change in the light transmittance of the greenhouse film before and after application of dust method and little change of the photosynthetic rate of crop leaves. The deposition volume of the agent on the operator after the treatment of 67m ~ 2 greenhouse was 0.21μg / cm ~ 2, while the high-volume spray method is as high as 5.70μg / cm ~ 2. The dust method is safer for the operator. After the dust method is applied, the medicament is uniformly deposited on the cucumber plants with the surface sedimentation rate of only 27.6% and the pesticide effective utilization rate as high as 70 %the above. Description Dust method applied to greenhouse technology in greenhouse use.