Professor invents 'ripeness' sticker

Peaches are displayed at a roadside stand in Stonewall, Texas, in this 2003 file photo. A University of Arizona professor has invented a sticker that can tell consumers if a fruit or vegetable is ripe. (AP Photo/Eric Gay, FILE)

(AP) -- A University of Arizona professor has invented a sticker that can tell consumers if a fruit or vegetable is ripe. The stickers will be available to growers next year and should make their way to supermarkets within two to three years, said Mark Riley, a UA assistant professor of agricultural and biosystems engineering.

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