Isolation and identification of samples of mosaic diseased vegetable marrow collected from various localities in North China revealed that this disease is caused by the Muskmelon Mosaic Virus (MMV).

• 正>自西葫芦花叶病株所采的标样,经鉴定后都属于甜瓜花叶病毒种羣,可侵染葫芦科植物,产生系统性花叶症,不侵染茄科,物理属性也与过去报导基本一致。