Field symptoms and morphological characteristics of Cladobotryum verticillatum. A Diseased fruiting bodies in the wild; B Colony on PDA; C Conidiophores with whorled and single phialides; D-F Tapered conidiogenous cells form singly or in whorls; G Conidiogenous cells; H Conidia; I, J chlamydospore; K, L Healthy mushrooms in the wild; M-P Mushrooms artificially inoculated with pathogens at 24 h, 48 h, 72 h and seven days, respectively. Bars: C–G, I, J = 20 μm; H = 10 μm