One must choose the right dust agent. Spraying powder should use special dust agent. Commonly used wettable powders are generally not used for dusting, otherwise it is easy to burn the leaves. The commonly used dust agents are: control cucumber downy mildew, gray mold, tomato late blight, use 5% chlorothalonil dust agent; control cucumber anthrax, use 5% chlorothalonil or 12% charcoal dust agent; control cucumber Bacterial angular spot, use 10% B drops of dust.

Second, pay attention to spraying methods. Spraying should be evenly sprayed on the air instead of spray on the plants, so that the pesticides can be scattered on the leaves of the plants in order to achieve good results; if spraying directly on the vegetables, it is prone to uneven use, and some powders cannot be used. Disperses well on the leaves, making it less effective.

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