绪论冈山县中北部的台地地带,气候凉爽、温差较大、适合于葡萄栽培。到目前为止,已有300多公顷的栽培面积。然而,近年来,2—4年生的幼树出现了萌芽弱、新稍萎缩、结实不良等现像,这种现像在全国各地时有发生,严重地阻碍了葡萄的生产,特别是在冈山县中南部的久未郡未南镇的山芋团地地带,新栽植的30公顷葡萄树几乎全部受到危害,这种病害已成为当前葡萄生产上的重要病害。在1963年和1971年,冈山县曾先 Introduction Okayama Prefecture, north-central Taiwan area, cool climate, large temperature difference, suitable for viticulture. So far, more than 300 hectares have been cultivated. However, in recent years, 2-4 year-old saplings have emerged as young germs, new ones slightly atrophied and poorly stunted. This phenomenon has occurred all over the country from time to time, seriously hindering the production of grapes, especially in Ganga Almost all of the newly planted 30 hectares of vines are harmed by the potato cluster in the non-southern town of South Africa in the south-central part of Mountain County. The disease has become an important disease in current grape production. In 1963 and 1971, Okayama Prefecture had preceded