卡松对几种重要植物病原菌的抑制活性

Inhibitory activity of Kathan against several important plant pathogens

在实验室条件下,分别测定了1.5%卡松对棉花枯萎病菌、棉花红腐病菌、棉花红粉病菌、棉花黄萎病菌和棉花疫病菌等5种重要植物病原真菌及水稻白叶枯病菌、大白菜软腐病菌等两种重要植物病原细菌的抑制活性。结果表明,1.5%卡松对棉花枯萎病菌的MIC和EC50分别为40mg/L和9.2034mg/L,对棉花红腐病菌的MIC和EC50分别为40mg/L和0.7845mg/L,对棉花红粉病菌的MIC和EC50分别为20mg/L和0.6951mg/L,对棉花黄萎病菌的MIC和EC50分别为20mg/L和2.8383mg/L,对棉花疫病菌的MIC和EC50分别为2mg/L和0.3459mg/L;对水稻白叶枯病菌和大白菜软腐病菌的MIC分别为1mg/L和10mg/L;说明该药剂对供试7种植物病原菌均具有良好的抑制活性,尤以对棉花疫病菌和水稻白叶枯病菌的抑制活性较强。

The inhibitory activity of 1.5% Kathan was tested against five plant pathogenic fungi and two plant pathogenic bacteria under laboratory conditions. The minimum inhibitory concentrations （MIC） of 1.5% Kathan for Fusarium oxysporum f.sp. vasinfectum, E moniliforme, Trichothecium roseum, Verticillium dahliae, and Phytophthora boehmeriae were 40, 40, 20, 20, and 2 mg/L, respectively, while EC50s were 9.20, 0.785, 0.695, 2.84, and 01346 mg/L, respectively. MIC of 1.5% Kathan for Xanthomonas oryzae Dowson, Erwinia carotovora PV. carotovora were 1 and 10 mg/L, respectively. These results suggest that Kathan has good inhibitory activity against the 7 pathogens tested, especially against P. boehmeriae and X. oryzae Douson.