番木瓜环斑花叶病是一种毁灭性的病毒病。近十多年来,本病在海南岛也蔓延成灾,引起各方面的重视。其症状特点是:病叶表现水渍状环斑及花叶,叶柄及茎部有水渍状条斑,果实上有明显的水渍状环斑。在电子显微镜下观察,可见到线状颗粒及细胞中的环状包含体。线状颗粒长度为800nm左右。在浸出的线状病毒中未测到有533nm长度的番木瓜花叶病毒。因此,海南岛所发生的这种病,可鉴定为番木瓜环斑花叶病病毒。 Papaya ring mosaic disease is a devastating virus disease. In the past ten years or so, the disease has also spread in Hainan Island and has drawn great attention from all quarters. Symptoms are characterized by: diseased leaves showed water-like ring-shaped spots and mosaic, petiole and stem water-like stripe, the fruit has obvious water-like ring-shaped spots. Observed under an electron microscope, the linear inclusions in the linear particles and in the cells can be seen. Linear particle length of about 800nm. Papaya mosaic virus, 533 nm in length, was not detected in the leached linear virus. Therefore, the occurrence of this disease in Hainan Island, can be identified as papaya gustavirus.