Anastomosis Group Determination of Rhizoctonia solani Kühn (Telemorph: Thanatephorus cucumeris) Isolates from Tomatoes Grown in Aydin, Turkey and their Disease Reaction on Various Tomato Cultivars

In the Province of Aydin-Turkey most frequently Fusarium spp. and secondly Rhizoctonia solani Ku¨ hn were isolated from the roots and crown of tomato plants. Based on affinities for hyphal fusion with test isolates, all R. solani isolates were identified as AG-4. The tomato cultivars which were grown in soil infested with R. solani AG-4 exhibited different reactions. From the point of symptom expression and the rate of seedling emergence Sunny 6066 F1 was found to be the most resistant cultivar, whereas Rio Grande, Rio Fuego, NDM 725, Interpeel and Konia were the most susceptible cultivars.