继1985年4月我站查获樱花根头癌肿病菌 Agrobacterium tumefaciens(E.F.Smi-thet Touns)Conn 后,1986年3月我站又在日本友好人士赠送给重庆医科大学的200株樱花苗(分染井吉野、关山樱花、八重樱花3个品种)上查获根头癌肿病病株159株,病株率占79.5%。鉴于其寄主广,为害严重,且在我市未见报道,我们根据有关规定,烧毁全部病株,不带病的樱花苗指定重庆医科大学用500—1000ppm 的链霉素液处理后集中隔离试种, Following the seizure of the Agrobacterium tumefaciens (EFSmi-thet Touns) Conn at the Sakura Station in April 1985, the station donated 200 cherry seedlings (distributed to wells in Chongqing Medical University in March 1986) Yoshino, Kyoriyama cherry, eight cherry Sakura three varieties) were detected root swollen disease strain 159, 79.5% of diseased plants. In view of its wide host, serious damage, and no reports in the city, according to the relevant provisions, we burned all diseased plants, disease-free cherry seedlings designated Chongqing Medical University with 500-1000ppm streptomycin solution after the concentration of isolation test Species,