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对7个萝卜黑腐病菌x－6A、xd、xe、xf、xg、xh、x－h－v菌株进行致病力测定表明，7个菌株间致病力强弱有明显差别，以x－6A、x－h－v菌株致病力最强。以致病力强的x－6A作菌源，对萝卜苗期抗性鉴定接种方法及发病条件进行比较，结果表明，萝卜苗期以4～5片真叶接种时最能表现抗性差别，接种方法以喷雾法并保持95％空气相对湿度24h，温度25℃为最好；接种浓度以1．0×108cfu／ml为宜，剪叶法接种3份萝卜种质材料之间抗性差别不明显。
The pathogenicity test of seven radish black rot pathogens x-6A, xd, xe, xf, xg, xh and x-h-v showed that there was a significant difference in pathogenicity between the seven strains. 6A, x-h-v strain the strongest virulence. The pathogenicity of x-6A was used as the bacterial source to compare radish seedling stage resistance identification inoculation methods and disease conditions. The results showed that radish seedlings with 4-5 true leaf inoculation showed the most resistance difference, Inoculation method to spray method and maintain 95% relative humidity 24h air temperature, 25 ℃ is the best; inoculation concentration of 1.0 × 108cfu / ml is appropriate, the law of the leaf cut inoculation 3 Radish germplasm material resistance difference is not obvious.