Wine enthusiasts concerned with potential environmental and health effects of synthetic pesticides prefer to buy "organic" pinots, chardonnays and other varietals. Now scientists are onto a new practice that could help meet that demand. They report that shining short-wavelength ultraviolet light (UV-C) on grapes right before harvest boosts levels of the fruits' own disease-fighting compounds, which could reduce the need for pesticides. The study appears in ACS' Journal of Agricultural and Food Chemistry.