应用电导率评价蔬菜抗病性的最佳时期

以菜豆、芫荽、根甜菜和甘蓝的抗病和感病品种为试材,分别接种了根腐病(Rhizoctonia solani),叶斑病(Ramularia coriandri),立枯病(Aphanomyces cochlioides 等)和灰霉病(Botrytis cinerea)病原菌,并测定病原菌侵染后的电导率。结果表明:菜豆、芫荽和甘蓝在接种后第3天,根甜菜在接种后第4天,感病品种的电导率值比抗病品种分别高28％、25％、179％和12％,因此,这一时间可以作为鉴定以上4种蔬菜抗病性的最佳时期。

Optimum Time of Evaluation on Vegetables Disease Resistance Using Electric Conductivity

Different varieties of bean, coriander, red beet and cabbage with different levels of disease resistance were used as materials. Pathogen, Rhizoctonia solani, Ramularia coriandri, Aphanomyces cochlioides and Botrytis cinerea were inoculated, respectively. The result showed that 3 days for bean, coriander and cabbage, 4 days for red beet after inoculation, electric conductivity of susceptible varieties were 28 % ,25 % , 179 % and 12 % higher than resistant ones, respectively. Therefore, the limes may be used as the best period for evaluation of disease resistance of these vegetables.