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近年来冬季保护地番茄受病毒病影响产量损失较大,很多番茄产区改种了抗病毒病品种。但其中部分品种对灰叶斑病和细菌性髓枯病的抗性较差,生产上应注意加强对这两种病害的防治。灰叶斑病发病初期叶面布满水浸状暗褐色圆形小斑,之后病斑沿叶脉向四周扩大,发展为不规则形;病斑中部渐褪为灰白色至灰褐色,稍凹陷,极薄,后期易破裂、穿孔或脱落。可在发病初期用33.5%喹啉铜悬浮剂(750倍液)或铜高
In recent years, the winter protected areas of tomato affected by the virus disease yield loss, a lot of tomato replanting varieties of anti-virus disease. However, some of them have poor resistance to gray leaf spot and bacterial mycelia, and should pay attention to the prevention and control of these two diseases in production. At the early stage of gray leaf spot disease, the foliage was covered with small, dark brown round spots which flooded along the veins and developed into an irregular shape. The middle part of the lesion gradually faded from gray to gray-brown, slightly depressed, Thin, late rupture, perforation or fall off. 33.5% copper can be used in the early stages of suspension of copper (750 times) or copper high