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近年来,我们调查了几种蔬菜病毒病,并作了初步鉴定,现报告如下。 (一)大蒜黄条斑病大蒜黄条斑病在上海郊县发生较普遍。患病植株生长纤弱,叶片上可看到有退绿黄色条斑,蒜头较小,品质下降。该病长期以来曾被认为是生理性病害。我们取崇明、上海、嘉定等县患黄条斑病大蒜叶片,用浸出法制样,在电镜下可见病株中存在一种线状病毒质粒,长度为1200～1400毫微米,最短的600毫微米左右,最长可达3300毫微米以上(图1),而大蒜健株中不存在这种线状病毒。因此,大蒜黄条斑病可能并非生理性病害,而是由大蒜黄条斑病毒所致。
In recent years, we investigated several vegetable virus diseases, and made a preliminary identification, are as follows. (A) garlic yellow leaf spot garlic yellow leaf spot occurred in Shanghai suburbs more common. Sick plants grow weak, the leaves can be seen on the back green yellow streaks, garlic smaller, lower quality. The disease has long been considered a physiological disease. We take Chongming, Shanghai, Jiading and other yellow patches of garlic leaf disease, with the leaching of legal samples, the virus can be seen in the diseased plants in a linear virus plasmids, the length of 1200 ~ 1400 nm, the shortest 600 nm Or so, the longest up to 3300 nm (Figure 1), while garlic does not exist in this strain of healthy virus. Therefore, the garlic yellow leaf spot may not be a physiological disease, but caused by the garlic yellow streak virus.