ABSTRACT
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.