A new fungal disease of stem wilt was found on Polygonum capitatum. The isolate was obtained from diseased field sample. This study was to identify and characterize the isolate. Based on analysis of ITS, EF-1αand β-tubulin sequences, the isolate was placed in Fusarium equiseti clade in phylogenetic tree. In combination of morphological characteristics the fungal isolate was identified as F. equiseti, a new pathogen on Polygonum capitatum. To determine the optimal nutritional and cultural conditions for the ...