香龙血树真菌病害的鉴定

1997-2000年在广州地区的香龙血树Dracaena fragrans(L.)Ker-Gaw.]种植单位共调查到9种真菌病害，即：可可球二孢茎枯病，顶多毛孢叶斑病，弯孢霉灰斑病，弯孢霉褐斑病，炭疽病，拟盘多毛孢叶斑病，拟茎点霉灰斑病，拟茎点霉叶斑病和球壳孢叶枯病，其病原菌分别被鉴定为：可可球二孢（Botryodiplodia theobromaePat.)、龙血树顶多毛孢（Bartalinia dracaenaeaP.G.Xi,Z.D.JiangetP.K.Chi)，弯孢霉Gurvularia lunata(Walker)Boedijn]、塞河弯孢霉Curvularia senegalensis(Speg.)Subram]、围小丛壳Glomerella cingulata(Stonem)Spauld,etSchrenk]，棒孢拟盘多毛孢Pestalotiopsis clavispora(Atk)Stey]、龙血树拟茎点霉（phomopsis dracaenae Sahni)，龙血树生拟茎点霉（Phomop-sis dracaenicola Z.D.Jiang,P.G.XietP.K.Chi)，龙血树球壳孢（Sphaeropsis dracaenaeP.G.XietP.K.Chi)，对生产影较大的是由可可球二孢引起的茎枯病和由围小丛壳引起的叶部炭疽病。

Identification of the Fungal Diseases on Dracaena fragrans

Nine kinds of fungal diseases bark rot,anthracnose, and seven kinds of leaf spots on Dracaena fragrans (L.) Ker Gawl. in Guangzhou region were investigated and identified in 1997 to 2000. The pathogens were Botryodiplodia theobromae Pat., Bartalinia dracaenaea P.G.Xi, Z.D.Jiang et P.K.Chi, Curvularia lunata (Walker)Boedijn, Curvularia senegalensis (Speg.) Subram., Glomerella cingulata (Stonem.) Spauld. et Schrenk, Pestalotiopsis clavispora (Atk.) Stey., Phomopsis dracaenae Sahni ,Phomopsis dracaenicola Z.D.Jiang, P.G.Xi et P.K.Chi, Sphaeropsis dracaenae P.G.Xi et P.K.Chi . Two severe diseases in the plantations of Dracaena fragrans were bark rot caused by B. theobromae and anthracnose caused by G. cingulata .