| Four fungal pathogens were reported for the first time in several Iraqi mushroom farms (Agriculture Research Office and College of Agriculture, Tikrit University) , three of them including: wet bubble caused by Mycogone perniciosa , Verticillium spot caused by Verticillium fungicola and cobweb mould caused by Dactylium dendroides infect the mushroom fruit bodies and caused direct losses in its yield. The fourth pathogen related to green moulds Trichoderma viride and T. harzianum , which infect the mushroom mycelium and caused indirect losses in its yield, T.harzianum showed attacked ability to the mature and ultra mature fruit bodies . Nine fungal competitors were also reported in this study including: the ink cap Coprinus sp., brown mould or cinnamon mould Botrytis crystalline (imperfect stage) , green moulds Penecillium sp. ، Aspergillus sp، Cladosporium sp., olive green mould, Chaetomium olivaceum , false truffle Diehliomyces microsporus , white plaster mould Scopulariopsis fimicola and brown plaster mould Papulaspora byssina ,which regarded as mould weed , in addition to eleven fungi infect the mushroom spawn and caused completely losses in it. |