为了防治狭叶十大功劳白粉病，在充分了解其发病规律的基础上，对狭叶十大功劳白粉病的发病情况进行了较系统的观察和调查，同时应用4种药剂对狭叶十大功劳白粉病进行了药剂防治试验。结果表明：狭叶十大功劳白粉病在苏州全年发病具有明显的季节性，每年的5月上旬至6月中旬和10月下旬至11月下旬是2个发病高峰期。在发病初期使用15％三唑酮可湿性粉剂2000倍液进行药剂处理，可以有效控制病情的蔓延。% In order to control the powdery mildew of Mahonia fortunei ,based on its occurrence law ,the inci-dences of powdery mildew of Mahonia f ortunei were observed and investigated systematically ,and chemical control experiment on powdery mildew of Mahonia f ortunei were tested by 4 kinds of chemicals .The results showed that the powdery mildew of Mahonia f ortunei had obvious seasonal character in Suzhou .It occurred in early May to mid June and late October to late November as two peak period of disease .Using 15% triadimefon WP 2 000 times liquid could effectively control the disease at the early stage .
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