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对番茄早疫病的防治,除选用欢乐1号、密植红等较抗病的品种,实行大面积轮作和加强田间水肥管理等外,生产上很重要的一项措施就是喷杀菌剂保护。1984年我们在生产上推广百菌清、灭菌丹、代森锰锌等防治番茄早疫病时,普遍反映效果较好,明显高于硫酸铜等对照药。但也有些地方防效较差。那么,为什么同用一种杀菌剂,防效高低差异很大呢?
The prevention and treatment of tomato early blight, in addition to the selection of Happy No. 1, dense reddish more resistant varieties, the implementation of large-scale rotation and strengthening the field of water and fertilizer management, production is a very important measure is to spray fungicide protection. In 1984 we promote the production of chlorothalonil, sterilization Dan, mancozeb and other control of tomato early blight, the general effect is better, significantly higher than the control drugs such as copper sulfate. But in some places, the control effect is worse. So, why use a fungicide, the level of control vary widely?