1发病症状番茄幼苗和成株期均可受害,可危害植株的叶片、茎、花和果实,但以花器和幼果受害最重。1.1苗期发病症状苗期多从子叶和下部叶片开始发病,一般叶片先从叶尖开始形成大“V”字形病斑,再向内扩散。病斑初期呈水渍状,边缘不明显,浅灰褐色,后期干枯,潮湿时表面出现灰色霉层,叶背较多。1.1花和果实发病症状往往先从花开始发病,并从花器蔓延到果实上,果实被害多以青果为主, 1 symptoms of tomato seedlings and adult stage can be damaged, can damage the leaves of plants, stems, flowers and fruits, but flowers and young fruit hardest hit. 1.1 Seedling symptoms More seedlings from the cotyledons and lower leaves began to attack the general leaves from the tip of the first large “V ” shaped lesion, and then spread inward. Early lesions were water-like stains, the edge is not obvious, light gray-brown, late dry, damp surfaces gray mold layer, leaf back more. 1.1 The symptoms of flowers and fruit often start with the onset of disease, and spread from the flower to the fruit, the fruit is mostly harmed fruit,