Fig. 1

Disease symptoms on roses caused by Botrytis cinerea. a The pathogen invaded through the wound stem of roses. b The pathogen caused stem death, and a large number of conidia were produced at the late stage of infection.c The sepals and outer petals of the bud were infected in the early stage. d The bud rotted, and a large number of conidia were produced on its surface at the late stage of infection. e White, red, or light-yellow spot symptoms were produced on the petals. f The lesion gradually expanded, and the petals began to rot, taking on a water-stained, yellow or brown appearance. g The petals were rotted, and conidia were produced on the surface at the late stage. h Gray mold infection caused the leaves to wither and fall, and a large number of mycelia and conidia are attached to the surface of the leaves in a humid environment