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葡萄在生长季节经常发生病害,如何能早发现早防治呢?其最佳方法是:在生产园中栽几株品质好,但容易染病的欧亚种葡萄做“观察哨”,只要一发现它生病,就预示全园要发病,应
The best way to find early prevention and cure of grapes in the growing season is to plant several good and easy-to-find grapes in Europe and Asia as “observation posts” , It indicates that the whole park should be onset, should