以哈尔滨市阿城区白菜根肿菌的休眠孢子为试材,对其进行萌发测定,研究了不同因素对休眠孢子萌发的影响。结果表明:休眠孢子萌发的适宜温度为24℃,适宜pH为6.3;黑暗处理的休眠孢子比光照处理的休眠孢子萌发率高,分别为73.33%和12.16%,腐烂处理根肿的萌发率最高为73.33%。以上结果表明白菜根肿病容易发生在低温和偏酸性条件下。 The dormant spores of P. brassicae in Acheng district of Harbin were used as materials to determine their germination. The effects of different factors on resting spore germination were studied. The results showed that the suitable temperature for dormancy spore germination was 24 ℃, and the optimum pH was 6.3. The dormancy spores in darkness had higher germination rate than the rest dormancy spores, which were 73.33% and 12.16% respectively. 73.33%. The above results show that cabbage clubroot disease occurs easily in low temperature and acidic conditions.