SEL’SKOKHOZYAISTVENNAYA BIOLOGIYA [AGRICULTURAL BIOLOGY], 2014, ¹ 6, pp. 116-122 ISSN 313-4836 (Online) Feed sanitation control UDC 636.086:636.085.19:632.4 doi: 10.15389/agrobiology.2014.6.116rus doi: 10.15389/agrobiology.2014.6.116eng MYCOTOXIN CONTAMINATIONS IN COMMERCIALLY USED HAYLAGE AND SILAGE G.P. KONONENKO, A.A. BURKIN All-Russian Research Institute of Sanitary, Hygiene and Ecology, Russian Academy of Agricultural Sciences, 5, Zvenigorodskoe sh., Moscow, 123022 Russia, e-mail kononenkogp@mail.ru Received March 24, 2014 Abstract Improvement of sanitary control of grass fodder, taking into account the whole variety of factors that have a negative impact on the animal, is the most important task of agricultural science. <...> In the present study, we investigated mycotoxin contamination of hayage and silage by the method of indirect competitive enzyme-linked immunosorbent assay. <...> In a survey of 30 commercial feed batches from the livestock farms located in the central regions of the European Russia, namely Bryanskaya, Lipetskaya, Moskovskaya, Smolenskaya and Tverskaya provinces, a multiple contamination pattern was shown. <...> Alternariol was found in all samples of the both types of feeds in amounts from 50 to 1260 µg/kg, while aflatoxin В1, ochratoxin A, citrinin and ergot alkaloids had extensive distribution with low intensity. <...> In haylage with high incidence of all analyzed fusariotoxins, mass concentration of Т-2 toxin was the lowest (4 to 30 µg/kg), and the levels of diacetoxyscirpenol, deoxynivalenol, zearalenone and fumonisins were in the range of 100-1000 µg/kg. Sterigmatocystin, emodin, cyclopiazonic and mycophenolic acids, PR-toxin occurred everywhere, wherein emodin, cyclopiazonic acid and PR-toxin often present in amounts up to 1000 µg/kg. Silage prepared mainly from corn grass, with frequent detection of T-2 toxin and deoxynivalenol in significant content (to 350 and 2820 µg/kg, respectively) revealed similarities with corn grain from the center of European Russia. <...> Sterigmatocystin and emodin were detected in all silage samples, whereas PR-toxin, cyclopiazonic and mycophenolic acids were slightly inferior to them in frequency. <...> A botanical composition of herbage and features of toxin-producing fungi complexes, accompanying the growing season and the subsequent process of fermentation, are discussed among possible reasons for the differences in mycotoxin contamination of haylage and silage. <...> Haylage and silage are very close to green fodder in biological <...>