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Devido aos riscos de contaminação por micotoxinas, o controle fúngico em alimentos deve ser adotar medidas desde o início do desenvolvimento microbiano. A substituição de fungicidas químicos por ácidos orgânicos (geralmente reconhecidos como seguro) desponta como uma perspectiva interessante. A pesquisa teve como objetivo determinar concentração inibitória mínima (CIM) de ácidos orgânicos, sorbato de potássio e respectivas combinações no controle de Aspergillus flavus NRRL 3251 produtor de aflatoxina B1. O inóculo de 104 esporos.mL-1 foi calculado baseado na contaminação real em milho e ração animal. As melhores CIM in vitro foram: combinação de ácido acético (AA 83,26 mM) + propiônico (AP 6,74 mM); AA (8,32 mM) + sorbato de potássio (SP 13,31mM) e AP (6,74 mM) + SP (33,28 mM). Considerando a dose comercialmente utilizada de ácido propiônico 0,5%, a combinação do ácido propiônico com sorbato de potássio e ácido acético poderia reduzir respectivamente cerca de 24,63 e 70,19% o custo em conservante.
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