PATHOTYPES OF THE CAUSAL AGENT OF POTATO WART DISEASE (Synchytrium endobioticum (Schilb.) Perc.) AND ITS DISTRIBUTION IN THE WORLD AND IN TURKEY

Synchytrium endobioticum the causal agent of the disease known as potato wart or potato cancer is a soil borne, obligate fungus of which potato is the only host of culture plants. The disease completely prevents potato production under severe disease pressure by inhibiting tuber formation. S. endobioticum is capable of forming a lot of pathotypes. There are 37 known pathotypes of it described in Netherlands, Germany, Ukraine and Check Republic up to now. In every country, the pathotypes of the disease have been coded differently. Sometimes, the same numerical code or letter code has been used for various pathotypes. Lack of an internationally approved differential set prevents comparing newly described pathotypes well. These results create confusion in identification of the pathotypes. This causes incorrect regulation in the description of new pathotypes. In order to solve this problem, formation of a standard differential set and a new standard code is needed. This disease was determined in 7 provinces of Turkey and pathotypes 1, 6 ve Nev 38 were found in these areas.