过去几年,葡萄种植者在葡萄园中经常发现,正常的植株叶片会经过一系列黄色到棕色的颜色变化过程,而有些葡萄叶片在秋天会不明原因地变红。这种现象看起来像随机方式分布,有单株发病,有相邻植株小范围集中发病,也有覆盖整个地块全部发病。一般是在10月中下旬开始,红葡萄品种症状类似于卷叶病毒的症状,白葡萄品种叶片黄化和卷曲。 Over the past few years, grape growers have often found in vineyards that normal plant leaves undergo a series of yellow-to-brown color changes, while some grape leaves turn red for an unknown reason in the fall. This phenomenon looks like a random distribution of disease, there is a single disease, there is a small concentration of adjacent plants disease, but also cover the entire block all the disease. It usually starts in the second half of October. The symptoms of red grape varieties are similar to the symptoms of leaf curl virus. The yellow grape varieties and curly leaves are white grape varieties.