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在白粉病刚发生时,立即喷洒500倍液的小苏打,隔3天喷1次,连喷3～4次。如果白粉病较重,也可和
In the powdery mildew just occurred, immediately spray 500 times the liquid baking soda, spray 1 every 3 days, and even spray 3 to 4 times. If the powdery mildew heavier, but also and