近年来 ,由于红富士等易感病品种的大量栽培并已陆续进入结果盛期 ,树势相对地衰弱下来 ,轮纹烂果病乘虚而入 ,且呈日趋严重的趋势。若遇到多雨的年份 ,则可造成流行发生 ,1 998年调查 ,仅采果期果实轮纹病发病率就高达 3 0 %左右 ,亦有更甚者 ,烂果成堆 ,经济损失严重。1　发 In recent years, due to a large number of susceptible varieties such as red Fuji cultivated and have gradually entered the peak of the results, the relative weakness of the tree down, rotten rotten disease take advantage, and the increasingly serious trend. In case of rainy years, epidemics can be caused. In the 1998 survey, only the incidence of fruit ring rot was as high as 30% during the plucking period. What is more, the rotten fruits were piled up and the economic losses were serious. 1 hair