Cobwebbed mould - dangerous disease of cultivated fungi <i>Pleurotes ostreatus </i>Jacg.
Sympthomatology and outspread ways of dangerous disease of cultivated fungi Pleurotus ostreatus (Jacq) P. Kumm described in details. The peculiarities of the fomes - soilborne fungi Cladobotryum mycophilum (Oudem.) W. Gams & Hooz were investigated in lab and cultivating room condition. Prophilaxis and disease control discussed.