Identification of Pathogens of Fungal Diseases Caused Root and Crown Rot on Wheat Fields inTrakya Region

A survey study according to the systematic sampling methods was carried out to determine the level of root and crown rot fungal diseases in the wheat fields of Edirne, Tekirdağ and Kırklareli provinces in Trakya Region in years of 2006 and 2007 and identified of fungal pathogens. In this survey study carried out in the period of grain milk stage in second half of the June in 53 wheat fields in 2006 and 56 wheat fields in 2007. At the end of the study, the disease simptoms were observed in all fields (100 %), and any fields completely free from the disease were not seen. Infected plant ratio was determined to be 85 % in Edirne province, 73 % in Tekirdağ province, and 75 % in Kırklareli province according to the averagely values. Root and crown rot disease severities in the wheat cropping areas of Trakya Region were determined to be 37% in Edirne province, 29% in Tekirdağ province, 30% in Kırklareli province, and averagely 32% in all studying areas. Pathogens causing the diseases were determined as Fusarium sp., Psedocercosporella sp., Rhizoctonia sp., Cochliobolus sp., Rhizopus sp., Cephalosporium sp., Gaeumannomyces sp., Pythium sp. and Alternaria sp. The most common pathogen was found to be F. culmorum.