樟树烂皮病调查及病原菌生物学特性研究

The Cinnamomum camphora Bark Rot Investigates and the Cause Germ Biology Characteristic

樟树烂皮病危害主干和侧枝,平均发病率38%,以苗圃地和2～3 a生的幼树危害较为严重.研究表明:(1)该病是由子囊菌亚门茶蔗子葡萄座腔菌(Botryosphaeia ribis)所致,无性为半知菌亚门桑茎点菌(Phoma moricola);(2)该菌适宜生长的温度为30℃,pH为7.0;3%麦芽糖和98%相对湿度对无性孢子萌发极为有利;(3)多菌灵和福美砷能有效控制该病.

The Cinnamomum camphora bark rot usually occurs on the stems and side branches of the seedlings with 2~3 a,with an occurrence rate of 38%.The pathogen was identified as Botryosphaeria ribis(Tode),which belongs to Ascomycotina.The asexual pathogen was Phoma moricola Sacc,which belongs to Deuteromycotina.The stitable conditions for germ feat growth were temperature: 30,pH:7.0,relative humidity 98% in 3% maltose.Carbendazim and asomate could control this disease effectively.