Abstract
The antifungal activity of several chemicals against Cladobotryum varium was investigated. The inhibitive effect of Hibiten, Osuban and Mikurotoru H on the conidial germination was recognized in a 500 μg/ml concentration for a 5 min. treatment. However, these chemicals also inhibited the mycelial growth of Pleurotus eryngii, so it is suggested that these chemicals are able to only apply to the sterilization of growth houses. On the other hand, Benlate and Panmashu showed an inhibitive effect on mycelial growth of C.varium, but no effect was shown on the conidial germination. The treatment of the pinning cap with Benlate and Panmashu in primordia formation stage was useful in protecting the outbreak of Watakabibyo and their protective effect was continued until harvesting time. These results suggested that the chemicals used in this study are applicable in different cultivation stages of P. eryngii, that is, Hibiten, Osuban and Mikurotoru H are in cultivation house for cleaning and Benlate and Panmashu are in the primordia formation stage of P. eryngii.
