| abstract |
The present invention provides an improved casing spawn that reduces the time between casing and the onset of mushroom production. The casing spawn is prepared from particles containing no available nutrients and with a substantial capacity to hold moisture (nutritionally inert particles). The particles are amended with sufficient nutrients to support the growth of Agaricus bisporus mycelium but less than the amount known to inhibit mushroom primordium formation or allow mold growth. A mixture of these ingredients is moistened, sterilized, and inoculated with Agaricus bisporus mycelium. Following incubation to allow full colonization of the mixture, the colonized material is mixed with casing material in order to inoculate mushroom casing layers. The invention provides a fully functional casing spawn without sacrificing mushroom bed volume or risking the transmission of diseases to the crop. |