南瓜疫病(Pumpkin Phytophthora rot)主要为害茎蔓、叶片和果实(图1)。发病症状幼苗发病:多始于嫩尖,产生水渍状病斑,病情发展较快,萎蔫枯死,但不倒伏。叶片发病:叶片上产生暗绿色水渍状圆形病斑(图2),软腐,边缘不明显。也有从叶缘开始发病,向内扩展成圆形或不规则的大病斑,呈黄褐色湿腐状,空气潮湿时,病斑迅速扩展,叶片部分或大部分软腐、下垂,病部可见白霉。干 Pumpkin Phytophthora rot mainly affects stalks, leaves and fruits (Figure 1). Morphological symptoms of seedlings onset: More began in tender tip, resulting in water stain-like lesions, the rapid development of disease, wilted dead, but not lodging. Leaf incidence: the leaves produce a dark green water-like round lesions (Figure 2), soft rot, the edge is not obvious. There is also the onset from the leaf margin, inward expansion into a round or irregular big spot, was brown wet rot, the air is humid, the rapid expansion of lesions, the leaves part or most of the soft rot, sagging, the disease visible White mold. dry