Gagkaeva (All-Russian Research Institute of Plant Protection, St. Petersburg—Pushkin) for fungal identification and consultations Received April 27, 2016 A b s t r a c t Lack of information about the distribution of toxigenic Fusarium fungi in hay and cereal straw which is used for bedding and feeding animals inhibits preventive measures against animal toxicoses. <...> Multiple combined fusariotoxin contamination of hay was recently established during advanced mycotoxicological survey of commercially used batches from the livestock farms in European Russia (G.P. Kononenko, A.A. Burkin, 2014). <...> The aim of this work was to study the species complex of fusaric fungi in fodders from Chelyabinsk, Bryansk and Moscow regions of Russia in different years and to evaluate the toxin-producing capacity of their populations. <...> All 60 samples of hay and straw from Chelyabinsk region (1992) were colonized by fusaric fungi of 6 species — F. sporotrichioides Sherb, F. avenaceum (Corda ex Fr.) Sacc., F. poae (Peck) Wr., F. tricinctum (Corda) Sacc., F. culmorum (W.G. Smith) Sacc. and F. sambucinum Fuckel. <...> Unidentified Fusarium species were detected in hay of bromegrass, galega, annual (a mixture of wheat, oats and peas) and perennial grasses, and a complex of these fungi was found in rye straw. <...> The majority of samples (90 %) contained F. sporotrichioides (a single species, or this species along with other, but F. sporotrichioides mostly predominated). <...> Of 19 samples of the hay and straw harvested in the Bryansk region (2011), 16 were infected by Fusarium fungi belonging to the same 8 species. <...> F. sporotrichioides was found in 11 samples and prevailed, and the other 7 detected species were less frequent — F. tricinctum (4 samples), F. equiseti (Corda) Sacc. (3 samples), F. poae (2 samples), F. solani (Mart.) Sacc. (2 samples), F. culmorum, F. graminearum Schw. and F. semitectum Berk. et Rav. (each in one sample). <...> In fodders from Moscow region (2013) Fusarium fungi were found in 171 samples of 239 tested (71.5 %) and the affection was often very high. <...> Isolated fungi belonged to the same 8 species as in other regions mentioned. <...> By the frequency of occurrence they <...>