Root Rot of (Linn) Presl Caused by in China.

As a famous street tree, camphor () is widely planted worldwide. However, in recent years, camphor with root rot was observed in Anhui Province, China. Based on morphological characterization, thirty virulent isolates were identified as species. Phylogenetic analysis of combined , , , and sequences assigned the isolates to . Koch's postulates were fulfilled in the greenhouse, and the pathogenicity of was determined by root inoculation tests on 2-year-old camphor seedlings; the symptoms of indoor inoculation were consistent with those in the field. can grow at 15-30 °C, with an optimal growth temperature of 25-30 °C. The results of fungicide sensitivity experiments indicated that was the most sensitive to metalaxyl hymexazol, which may be a useful idea for the future prevention and control management of . This study provided the first step for further research on as a pathogen of camphor, and provided a theoretical basis for future control strategies.