Data provider:

Icon data provider

The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal article

Fungal and mycotoxins contamination in corn silage: Monitoring risk before and after fermentation  [2013]

Keller, L.A.M.; González Pereyra, M.L.; Keller, K.M.; Alonso, V.A.; et al.

Access the full text

Silage is a widespread practice to preserve forage. Poor storage conditions can lead to mold contamination and mycotoxin production. The aim of this study was to establish the occurrence of toxigenic fungal species and to determine aflatoxins (AFs), ochratoxin A (OTA), fumonisin B₁ (FB₁) and deoxinivalenol (DON) in corn silage intended for bovines before and after fermentation in farms located in São Paulo and Rio de Janeiro States, Brazil. Fungal counts were done by surface-spread method. Toxigenic ability of isolates was evaluated in vitro. AFs natural contamination was determined by TLC and HPLC. Total fungal counts were generally high. Aspergillus flavus, Penicillium citrinum, and Fusarium verticillioides were the prevalent species. Toxigenic strains were isolated. Aflatoxin levels differed (P < 0.0001) from 2 to 45 μg g⁻¹ and from 2 to 100 μg g⁻¹ in pre and post-fermentation samples, respectively. Ochratoxin A, FB₁ and DON levels found in pre-fermentation samples were higher than in post-fermentation (P < 0.0001). Mycotoxins and toxigenic fungi were present before and after fermentation in corn silage intended for bovines in Brazil. Aflatoxin B₁ (AFB₁) increased during storage whereas OTA, FB₁ and DON decreased. Determination of mycotoxin levels and their occurrence in corn silage are important to provide information so that the assessments of risk for animal feed and livestock environment could be made.

From the journal

Journal of stored products research

ISSN : 0022-474X