随着温室蔬菜栽培面积的扩大，番茄早疫病的发生日趋严重。一般减产10％－20％，严重地块，番茄植株中下部叶片枯死，果实变小，病斑增多，造成减产30％－40％。除危害番茄外，还可侵染茄子、马铃薯等。一、发病症状苗期及成株期均可染病，主要侵害叶片，也可侵染茎和果实。叶 With the expansion of greenhouse vegetable cultivation area, the incidence of tomato early blight is more and more serious. General cut 10% -20%, serious block, the lower leaves of tomato plants withered, smaller fruit, lesion increased, resulting in reduced production of 30% -40%. In addition to endangering tomatoes, but also infect eggplant, potatoes and so on. First, the incidence of symptoms Seedling and adult stage can be infected, the main violations of the leaves, but also infect stems and fruits. leaf