Abstract
Seed selection is one of the most important issues affecting yield and quality in agricultural production. In this study, the prevalence rates of Rhizoctonia solani and Fusarium spp., which are fungal disease agents, seen in different varieties of potato samples taken from some companies that commercially produce and sell seed potato tubers were investigated. For this purpose, a total of 48 batches of potatoes, consisting of Marabel, Agria, Madeleine and Marfona, which are some commercial varieties that are grown very frequently in our country, were obtained and evaluated in terms of the presence of fungal agents. The prevalence of the agents was determined by analyzing the randomly selected 90 potato tubers. After the isolation and characterization studies, it was determined that 3.87% of all samples examined were contaminated with Fusarium spp. and 0.11% with Rhizoctonia solani.