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What vegetable is the arrowhead, and how should its zonate leaf spot disease be prevented and controlled?
The arrowhead is a vegetable with a long history, appearing as early as the Tang Dynasty. The arrowhead is not only edible but also has certain medicinal value, being helpful for cooling the blood and stopping bleeding, relieving cough and treating strangury, dissipating nodules and detoxifying, and harmonizing the stomach and fortifying the intestines. In our country it is mainly grown in the provinces and regions