Fusarium oxysporum is the pathogen responsible for stem rot of the succulent plant Echeveria ‘Perle von Nürnberg’ and observation of the infection process

Abstract Echeveria ‘Perle von Nürnberg’ is a popular ornamental potted plant. In 2017–2018, stem rot lesions caused by Fusarium spp. were repeatedly observed on in Zhangzhou, Fujian Province, China. this study, samples collected to isolate the pathogen. After morphological observations, molecular identification, and pathogenicity measurements, pathogen was confirmed as oxysporum . Green fluorescent protein used label F. observe pathogenic process host Two three days after inoculation, conidia adhered surface of germinated into hyphae. The hyphae invaded cortex through wounds plant or stem-leaf junction. produced greyish-brown circular irregular lesions. Five expanded vascular cylinder proliferated. became larger neighboring leaves gradually fell off. Seven thalli continued proliferate host, expand, pith damaged. expand; stems branches withered lodged, numerous Given rapid infection plants, necessary prevention control measures should be employed prior infection. summary, study demonstrated that responsible for disease further revealed invasion modes pathways plant, providing an empirical basis diagnosis treatment