Occurrence and distribution of soybean sudden death syndrome by Fusarium solani in Lorestan province

Soybean (Glycin max L.) belongs to the legume family. It is used as cooking oil, margarine, shortening, salad dressings, soybean meal and it is a source of protein for human as well as livestock consumption. Soybean contains all essential amino acides except lysine. According to latest results, soybean products reduce blood cholesterol and consequenty decreases the risk of heart diseases.Samples were collected from soybean fields of Alashtar and Chaghalvandy during 2004- 2006 Cropping years. Collected samples were transferred to the laboratory and cultured on Nash and Snyder and general PDA media. One hundred and forty seven fungal isolates belonging to Fusarium genus were isolated. Two species namely Fusarium solani and F. equiseti with 98% and 2% frequencies were recognized, respectively. Pathogenisity of F. solani on soybean plants in the green house was confirmed using chlamydospore inoculum. Analyses data using MSTAT-C software and duncan multiple range test of means showed that F. sloani pathogenisity was significant (P<0.01). This disease is reported from Iran and Lorestan province for the first time.