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保护地蔬菜发生病虫害时，如采用喷雾法防治，易加大棚内湿度，不利于病虫防治。粉尘喷药技术，就是针对棚室内的特定环境条件，用喷粉器把粉尘剂型农药喷向棚室内空间，使粉尘颗粒在棚室内空间形成飘尘，并长时间地弥漫，均匀地沉落在蔬菜植株上。用此方法防治棚室内蔬菜的病?
Protected vegetable pests, such as the use of spray prevention and control, easy to increase the humidity inside the shed is not conducive to pest control. Dust spray technology is directed against the specific environmental conditions inside the shed, with a dusting powder pesticide spray to shed indoor space, the dust particles in the shed space formed floating dust, and for a long time diffuse, evenly sank in the vegetables On the plant. Use this method to control indoor greenhouse disease?