加拿利海枣褐斑病的病原菌鉴定

Pathogenic Identification of Phoenix canariensis Leaf Spot Disease

于2005~2007年间调查棕榈科植物病害的过程中,发现加拿利海枣(Phoenix canariensis)上发生一种严重的褐斑病。该病危害植株的叶片和叶柄,产生褐色、近椭圆形或不规则形的病斑,严重时植株病斑累累,直至干枯而死。按照柯赫法则对该病病原菌进行鉴定,常规病组织分离获得柯氏帚梗柱孢霉(Cylindrocladium colhouniiPeerally),并以离体叶片法和盆栽苗接种法回接加拿利海枣,产生的症状与田间表现一致,并从接种病株上重新分离到相同的病原菌。结果表明,该病的病原菌为柯氏帚梗柱孢霉(Cylindrocladium colhounii Peerally)。

In a survey to the diseases of Palmae plants made during the years from 2005 to 2007,Phoenix canariensis was found to be infected by a serious brown-spot disease.The diseased plants were observed with brown,nearly oval or irregular-shaped lesions on the leaves and petioles,and then eventually dried up or died.The pathogen of this disease was identified according to the Koch’s postulates.The fungus of Cylindrocladium colhounii Peerally was isolated from the diseased tissue,and then inoculated onto the host p...