Organic Acids

Organic acids such as lactic and acetic acids are effective antibacterial agents [97] and are classified by the FDA as GRAS [98,99] (21CFR184.1005; 21CFR184.1061). Lactic acid dips and sprays are used commercially to decontaminate animal carcasses containing E. coli O157:H7, L. monocytogenes, and salmonella [100] (see additional information from Purac America, Inc., Lactic acid rinses might have applications for the decontamination of fruits and vegetables. A 5% acetic acid wash was reported to reduce the population of E. coli O157:H7 on inoculated apples by about 3 logs [31]. In another study, apples that had been inoculated with E. coli O157:H7 were treated with 5% acetic acid at 55°C for as long as 25 minutes. While the E. coli population was greatly reduced in the apple skin and stem areas, as many as 3 to 4 logs survived in the calyx tissue [101]. In a more recent study, application of 2.4% acetic acid to apple disks that had been inoculated with S. mbandaka or S. Typhimurium resulted in population reductions of 1.1 and 1.4, respectively [102]. However, the combination of 5% acetic acid with 5% hydrogen peroxide yielded a population reduction approaching 4 logs. It is not clear whether organic acid treatments would produce off-flavors or discoloration in treated produce.

Organic Gardeners Composting

Organic Gardeners Composting

Have you always wanted to grow your own vegetables but didn't know what to do? Here are the best tips on how to become a true and envied organic gardner.

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