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1.病症的识别:在大棚和拱棚里栽培,一般4月中旬开始发病,露地栽培5月下旬—6月上旬发病。但以夏秋之间发病最重。除西瓜外、黄瓜、南瓜、越瓜等瓜类作物均可发病。病症表现是展开的叶片不规则,产生淡绿色的斑,并向上隆起形成严重凸凹不平的花叶症状,叶缘向背面卷缩。叶片簇生,植株矮化。瓜皮上有时出现微浓绿色不明显的瘿瘤,皮和肉中间部分呈现油浸状,种子周围形成空洞,果实中心部的纤维质变黄,果肉成条块状。
1. Identification of the disease: Cultivation in the shed and arch, usually the onset of disease in mid-April, open field cultivation in late May - onset in early June. However, the most serious incidence between summer and autumn. In addition to watermelon, cucumber, pumpkin, melon and other melons crops can be disease. The symptoms of the disease were irregular leaf depressions, pale green spots, and uplift to form a mosaic of serious irregularities that curled to the back. Leaf clusters, plant dwarf. The gourd skin is sometimes slightly greener in green with obvious nodules. The middle part of the skin and meat is oil-soaked with voids forming around the seeds. The fiber in the central part of the fruit turns yellow and the pulp becomes clumps.