龙胆草斑枯病由Septoria spp.侵染引起,主要为害叶片,是龙胆草生长过程中危害最严重的病害.目前缺乏对龙胆草抗病性、病害流行规律及防治技术等方面的系统研究.文章通过室内抑菌试验筛选出对该病原菌抑制效果较好的药剂叶病康和代森锰锌.田间药效试验结果表明,硫酸小诺霉素对该病的防治效果较好,在发病后期防治效果达69.2％.用70％甲基托布津(wp)处理种苗结合玉米间作和清除田间病残体,后期防治效果可达64.2％.%Gentian leaf blight caused by Septoria spp. Is a serious disease in gentian production in Heilongjiang Province in China. There are no effective methods for controlling this disease due to lack of systematic study on disease epidemics and controlling technology as well as gentian resistance to the disease. In the present study, yebingkang and mancozeb, which had high inhibitory effect on Septoria micropora based on the results of inhibiting experiments, were screened out of 12 fungicides, and micronomicin sulfate exhibited 69.2% of control efficiency in field, which was higher than other tested fungicides. An integrated control method consisting of seed treated using 70% thiophanate-methyl and intercropping with maize as well as cleaning up the remains in field at spring were recorded to be effective for controlling gentian leaf blight with 64.2% of control efficiency.
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