【摘要】 １９９３～１９９５年的研究表明：棉花黄萎病菌安阳菌系存在菌丝型、菌核型以及中间型等不同的培养类型。菌丝型为近年出现的新类型，其致病力是菌核型的２倍左右。田间致病类型主要为早期落叶型，此症状类型可造成棉花严重落叶甚至死株，其发生高峰为６月上中旬和８月下旬。菌丝型和菌核型对棉株的侵染率相同，在同一棉株内不能同时分离出两种类型菌，二者在总氨基酸含量及某些氨基酸含量上有明显差异。更多还原

【Abstract】 In a study in 1993～1995 on the differentiation of pathogenicity in Anyang strains of Verticillium dahliae Kleb. in cotton, the strains were classified into 3 types of nucleate, filamentous and intermediate in culture. The filamentous was a newly emerged type in recent years with its pathogenicity 2 times that of the nucleate type. In fields, the main pathotypes were of early defoliation that caused heavy defoliation or even death to infected cotton plants. They had an occurring peak in early mid. June to late August. The nucleate and filamentous strains had a similar infection frequency, but they could not be isolated at the same time from a same cotton plant. These 2 types of strains had their total amino acids and some of the amino acid concentration varying significantly.更多还原