摘要： 白菜接种黑腐病后，置15、20、25、30℃的光照培养箱中保湿48h.11天后移在室温下，病菌均可以完成侵染。病害的进程随着环境温度的提高而表现出正相关。在上述温度梯度下，大白菜黑腐病病情指数达到50的天数，分别为35、32、27、8天。使其致死的时间分别为41、35、32、32天。因此，鉴定时提高环境的温度，有利缩短发病的时间，若接种的温度控制在25℃或30℃，则接种后的第11或第8天即可进行病情调查。

关键词: 大白菜, 黑腐病, 温度, 侵染与发生

Abstract: The effect of temperature on the infection and disease development of Chinese cabbage bacterial black rot (Xanthomonas campestris pv.campestris) during the disease resistance evaluation was discribed in the paper.The results demonstrated that the pathogen could complete its infection process after inoculated under the temperature of 15, 20, 25 and 30℃ kept in growth chamber for 48 hours and shifted to room temperature conditions 11 days later.The development sped up with the increasing of temperature.Under the above temperatures,this pathogen needed 35, 32, 27 or 8 days respectively to attain the disease index of 50.And the LD100 needed 41, 35,32, 32 days respectively.Therefore the increasing temperature could cut short the time of the disease development.In fact the disease index could be assessed about 8-10 day after inoculation under 25 or 30℃.

Key words: Black rot, Temperature, Infection and development, Chinese cabbage

中图分类号: 

• S436.3