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晚疫病全生育期及叶、茎、果均可受害,以叶片和青果受害严重。幼苗发病一般先从叶片出现暗绿色水渍状病斑开始,而后向茎扩展,近叶柄处呈黑褐色腐烂,随病情发展,幼茎基部水渍状缢缩,植株萎蔫折倒。成株期发病从下部叶片开始向上发展,由叶尖、叶缘开始产生暗绿色水渍状病斑,逐渐变为褐色,病重时全株叶片干枯;茎上病斑为褐色或黑褐色水渍状,稍凹陷;果
The late blight of the whole growth period and leaves, stems, fruits can suffer, with leaves and green fruit serious damage. Seedling incidence generally begins with the leaves appear dark green water stain-like lesion began, and then to the stem expansion, near the petiole was dark brown decay, with the disease development, young stem base water-like shrinking, wilt plant collapse. The incidence of adult plants from the lower leaves began to develop upward, from the tip, leaf edge began to produce dark green water stain-like lesions, gradually turned brown, sick leaves when whole plant withered; stalk spots brown or dark brown water Stains, slightly depressed; fruit