Fusarium species as pathogens of potato tubers during storage and their ability to produce mycotoxins.

During 1985 and 1986 seasons from potato tubers with dry not symptoms 50 cultures belonging to nineFusarium species were isolated and their ability to form mycotoxins has been examined. The dominating species were:F. sambucinum Fuckel-52%,F. avenaceum (Fr.) Sacc.-8%,F. crookwellense Burges, Nelson and Toussoun-8% andF. culmorum (W. G. Smith) Sacc.-8%. p ]In cultures growing on wheat kernels all 26 isolates ofF. sambucinum formed diacetoxyscirpenol (DAS) in the amount of 20-1000 mg/kg. F. culmorum isolates produced zearalenone (F-2), deoxynivalenol (DON) and 3-acetyldeoxynivalenol (3-AcDON),F. crookwellense- zearalenone,F. avenaceum andF. subglutinans Wollenw. and Reinking- moniliformin (1330 and 66 mg kg respectively). T-2 toxin, HT-2 toxin, nivalenol and fusarenon X were not produced by any of the examined isolates.