date:Aug 19, 2013
oranges are viewed under UV light.
Packinghouse workers know to promptly cull any oranges that have this distinctive fluorescence signature on the peel. That's because the spots, more likely than not, are telltale indicators of the presence of Penicillium microbes that cause blue mold or green mold.
But other, less-studied patterns of fluorescence on navel orange peels may warrant more attention. Fluorescence in the form of specks, smears, smudges or blotches, for instance, may indicate the p