incidence of crown rot disease of wheat caused by fusarium pseudograminearum as a new soil born fungal species in north west iran.root rot and crown rot is one of the main important fungal diseases on wheat in north west iran. the disease was studied during 1999-2004 growing seasons in four provinces including qazvin, zanjan, east azarbyjan and ardabil. different wheat fields in the areas studied were visited and samples of the plants showing symptoms like chlorosis, withering, whiting of spikes, growth reduction and white heads were collected and transferred to the laboratory. samples were surface sterilized with sodium h ...200719093469
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