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以发病大花黄牡丹为试材,采用常规法分离培养、形态学鉴定、致病性测定等方法确定病原,并通过平皿菌丝生长抑制法筛选有效防治药剂。结果表明:大花黄牡丹叶斑病的病原菌为半知菌亚门叶点霉属斑点叶点霉(Phyllosticta commonsii)。抑制该菌菌丝生长效果较好的杀菌剂是30%嘧霉·福美双可湿性粉剂和80%嘧霉胺水分散粒剂(500倍液),抑菌率分别为82%和84%。该研究可为病害的有效控制提供前期研究基础。
Pathogenicity was determined by routine method, morphological identification and pathogenicity determination, and the effective agents for prevention and treatment were screened by the plate mycelia growth inhibition method. The results showed that Phyllosticta commonsii is the pathogen of the leaf spot disease of P. dahliae. The bacteriocides that inhibit the growth of mycelia of the strain were 30% azoxystrobin and thiram 80% pyrimethanil water dispersible granules (500 times), and the antibacterial rates were 82% and 84% respectively. This research can provide the basis of previous research for the effective control of diseases.