万寿菊细菌性叶斑病的发生与病原菌鉴定

Occurrence of Marigold Bacterial Leaf Spot and Identification of Its Pathogens

首次报道了万寿菊细菌性叶斑病在我国的发生。从吉林省敦化市不同地点、不同部位发病的万寿菊上分离出有致病性的 4个菌株 ,通过对其形态学、培养性状、生理生化性状及生态学的测定 ,并根据其引起病害的症状特点 ,将其确定为丁香假单胞菌万寿菊致病变种 (Pseudomonassyringaepv tagetis(Hellmers 195 5 )Youngetal 1978)。

The occurrence of marigold bacterial leaf spot was first reported in China. 4 pathogenative strains were isolated from different parts of the diseased plants in different regions of Dunhua city, Jilin province. Based on the determination of their morphology, cultural characteristics, physiological & biochemical characteristics and symptomatology, and on the comparison of these characterictics with the concerned parts in 《Bergey′s Manual of Determinative Bacteriology》 9th ed,the pathogens identified are Pseudomonas syringae pv. tagetis (Hellmers 1955) Young et al 1978.