Identification and pathogenicity of Fusarium spp. associated with tea wilt in Zhejiang Province, China

Background Tea is one of the most widely consumed beverages in the world, with significant economic and cultural value. However, tea production faces many challenges due to various biotic and abiotic stresses, among which fungal diseases are particularly devastating. Results To understand the identity and pathogenicity of isolates recovered from tea plants with symptoms of wilt, phylogenetic analyses and pathogenicity assays were conducted. Isolates were characterized to the species level by sequencing the ITS, tef-1α , tub2 and rpb2 sequences and morphology. Four Fusarium species were identified: Fusarium fujikuroi , Fusarium solani , Fusarium oxysporum , and Fusarium concentricum . The pathogenicity of the Fusarium isolates was evaluated on 1-year-old tea plants, whereby F. fujikuroi OS3 and OS4 strains were found to be the most virulent on tea. Conclusions To the best of our knowledge, this is the first report of tea rot caused by F. fujikuroi in the world. This provides the foundation for the identification and control of wilt disease in tea plants.