1985—1987年,在京郊蔬菜病害调查中发现下述3种新病害: 一、番茄灰斑病 1987年,北京东郊农场温室番茄严重发生。该病于10月中旬零星出现,11月初平均病株率50％,局部约85％。11月中病株率达100％,重病株的中、下部枝叶枯死或全株 1985-1987, in the suburbs of Beijing vegetable disease survey found the following three kinds of new diseases: First, the tomato gray spot disease In 1987, Beijing’s eastern suburbs farm greenhouse serious occurrence of tomatoes. The disease sporadically appeared in mid-October. At the beginning of November, the average rate of diseased plants was 50% and that of local plants was about 85%. In November, the rate of diseased plants reached 100%, and the middle and lower branches and leaves of seriously ill plants withered or the whole plant died