番茄疫病是大棚番茄常见的病害之一，因棚室内温度高、湿度大易造成大发生。如不加强管理，会形成大量烂果、死株甚至绝收。一、病状番茄的幼苗、茎叶、果实都可被害。幼苗被侵染初期表现褪绿，后来呈黑褐色椭圆形或梭形病斑，病情严重时秧苗茎部布满黑色病斑。叶上病斑初为针 Tomato blight is one of the common diseases of greenhouse tomatoes, greenhouse indoor temperature is high, humidity can easily cause big occurrence. If you do not strengthen management, will form a large number of rotten fruit, dead or even cut off. First, the symptoms of tomato seedlings, stems and leaves, fruits can be harmed. Seedlings were initially infected with chlorotic green, then dark brown oval or fusiform lesions, the disease is severe when the stems covered with black spots. Leaf early lesions for the needle