一、病害特征该病可危害番茄的叶片、叶柄、嫩茎和果实。多由下部叶片先发病,从叶尖、叶缘开始,病斑初为暗绿色水渍状,渐变为暗绿色,潮湿时在病处长出稀疏的白色霉层;茎部受害,病斑由水渍状变暗褐色不规则形或条状病斑,稍凹陷,组织变软;嫩茎被害可造成缢缩枯死,潮湿时亦长出白色霉 First, the disease characteristics of the disease can endanger the leaves of tomato, petiole, tender stems and fruits. More from the lower part of the first leaf of the disease, from the leaf tip, leaf margin began to lesion as dark green water-like, gradually changing to dark green, wet in the disease grow sparse white mold layer; stem damage, lesion from Watery stain dark brown irregular or stripe lesion, slightly depressed, tissue softening; young stems can cause shrinkage dead blight, also grow white mold when wet