The aims of this study were to determine the impact of storage practice and mold types on mold growth and aflatoxin B 1 (AFB 1 ) concentration in corn residue from local seed corn plants, the main roughage source of dairy farms in the northern region in Thailand. A total of 223 samples from 2 types of corn residue -dried and wet -were collected. Mold contamination was determined by spread plate technique, and aflatoxin B 1 (AFB 1 ) quantification was performed by a commercial enzyme-linked immunosorbent assay. Multivariate linear models were created to determine factors associated with fungal quantity and AFB 1 concentration. Results showed that the presence of Cladosporium spp. in the samples was associated with a lower risk of AFB 1 contamination (P<0.05) . In addition, appropriate storage practices, e.g. keeping feeds under a roof and using floor canvas under feed piles, gave lower risk of mold contamination and decreasing AFB 1 contamination.
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