Methods and compositions for treating living surfaces to control microorganisms are provided. The method treats produce by contacting a living surface with an aqueous solution comprising i) an organic peracid of the formula RC(O)OOH wherein R is methyl, ethyl, n-propyl, or s-propyl ii) a 2-hydroxy organic acid selected from tartaric acid, citric acid, malic acid, mandelic acid, and lactic acid and iii) water.
