The process aseptically inoculates a liquid media with a vegetative Xylaria fungal species to form a culture; statically incubates the culture in a vessel for a time sufficient to begin initiation of fruit body development and asexual sporulation and halts incubation at maximum conidia production prior to the beginning of sexual sporulation. Thereafter, the entire culture contents of the incubation vessel are macerated to homogenize the fungal biomass and conidia therein and form an inoculum.