长春和哈尔滨地区李子红点病发生危害调查

Investigation of Plum Red Spot in Changchun and Harbin

李子红点病是李子树发生比较普遍的一种真菌病害,为做好该病的流行预报和综合防治,于2017年9月对吉林省长春地区和黑龙江省哈尔滨地区李子红点病的发生危害情况进行了调查。结果表明:哈尔滨地区的李子红点病发生危害比较严重,发病率为98.2%,病情指数为63.90;而长春地区发生危害相对较轻,发病率虽为86.6%,但病情指数仅为26.90。

Plum red spot is an very important and common disease which is caused by Polystigma rubrum（Pers.）in China.In order to confirm its distribution and damages,we conducted a survey in Changchun and Harbin in September 2017.The results showed that plum red spot was very serious in Harbin,the incidence was up to 98.2% and the disease index was 63.90;While the incidence was 86.6% and the disease index was only 26.90 in Changchun.