Grape spraying when it rains

Answer: Spraying is time-sensitive. For drugs with a residual period of 17 to 21 days, it is usually sprayed once every 15 days. In rainy seasons, depending on the amount of rain, the spray interval should be shortened as appropriate. In the event of heavy rain, it should be sprayed after sunny weather. If the two drugs are acid and alkaline, the interval between them must be strictly observed to prevent acid-base neutralization. In short, the concrete response to the specific situation, see disease application, can not be rigidly adhered to law.

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