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蔬菜生产中经常发生一些不常见的病害,即使发生了常见病害在发病症状不典型时也难于诊断。病害诊断不准即判断不准发生了什么病,这些情况几乎每一个菜农都会遇到,一旦病
Some uncommon diseases often occur in vegetable production, even in the presence of common diseases, which are difficult to diagnose at onset of symptoms. Disease diagnosis is not allowed to judge that is not allowed to judge what happened in these situations almost every vegetable farmers will encounter, once the disease