目的通过对鱼腥草白绢病的发生发展规律和防治方法的研究,为该病的综合防治提供一定的依据。方法采用田间调查、田间试验和室内实验相结合的方式。结果种茎处理以多菌灵的效果最好,发病率最低,产量最高;PDA平板测定表明木霉对鱼腥草白绢病拮抗作用极强,优于常用农药处理;在3个木霉菌剂质量浓度中,20g/m²的防治效果最好,其防治效果达到了60.28%。结论采用多菌灵处理鱼腥草种茎和20g/m²木霉制剂处理土壤能较好地防治鱼腥草白绢病。

Objective To study the occurrence and spreading dynamics of Southern blight Houttuynia cordata and search for the control method so as to provide scientific basis for its integrated pets management (IPM). Methods The field investigation and the combined methods in both field trial and laboratory test were carried out for the research. Results After treated by Carbendaxim, the morbidity of Southern blight in H. cordata was the lowest and the yield of H. cordata reached to the highest level among all treatment groups. The PDA test revealed that Trichoderma huzirum had stronger antagonism to Southem blight in H. cordata than common fungicides. The best concentration of T. huzirum used in the soil treatment was 20 g/m², which had a preventive effect against Southern blight up to 60.28%. Conclusion The Southern blight of H. cordata could be well suppressed while both Carbendaxim and T. huzirum are used to treat the seeds and soil, respectively.