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葡萄桐是一个丛生性强、结实量高的三年桐(Aleurites fordii Hemsl.)品种,原产湖南泸溪,近年来引种范围极广,面积达百万亩之多。该品种在各地虽显示了丛生性强、早期结实量高的特性,然而大量枯果造成的丰产不丰收,是葡萄桐引种区面临的严重问题。福建沙县高乔公社林场500亩葡萄桐丰产林,1981年7月估计亩产90-100斤油,而最后实收则不足10斤。据1983年9月27日调查20株感病株,枯果率竟高达96.88%。浙江富阳县执中亭大队100亩葡萄桐丰产种子园,1983年10月中旬调查12块标准地,葡萄桐的平均枯果率为64.75%。湖南常德地区引种的葡萄桐,因果实黑斑病而每亩减收桐油5-7斤。
It is a species of Aleurites fordii Hemsl. It originated in Luxi, Hunan Province. In recent years, it has introduced a very wide range of millions of acres. Although the varieties showed the characteristics of strong cluster and high early-maturity in all areas, the high yield of large number of dry fruits did not increase, which was a serious problem for the introduction of grape. Fujian Shaxian Gaoqiao commune 500 acres of forest and fruit trees grapefruit yield forest, in July 1981 estimated yield 90-100 pounds of oil, while the final revenue is less than 10 pounds. According to September 27, 1983 investigation of 20 strains of susceptible strains, dry fruit rate as high as 96.88%. Zhejiang Fuyang County Executive Pavilion brigade 100 acres of grapefruit yield seed orchard, in mid-October 1983 survey of 12 standard, the average fruiting rate of 64.75%. Introduced in Changde, Hunan, grape vines, causal agents of black spot disease per mu reduction of tung oil 5-7 pounds.