07/17/06 Keeping Down the Brown

A new wash treatment developed by Agricultural Research Service scientists provides antibrowning as well as antimicrobial benefits to fresh-cut apples. Thanks to ARS research, managers at schools, grocery stores and restaurants nationwide have already been providing customers with sliced apples that stay fresh for several weeks. This ARS team now has discovered a dip solution--PQSL 2.0--that keeps sliced apples fresh and controls pathogens. Volunteer sensory panelists tasted four slices of Fuji and four slices of Granny Smith apples. Each slice had been dipped that day in one of four different commercial or ARS wash treatments including PQSL 2.0. The panelists then reported any differences detected in aroma and flavor. All four treatments were found to maintain the apple slices' cut-surface color, firmness, aroma and flavor similarly. Further preliminary studies have shown that a newer version of PQSL 2.0 controlled, or eliminated, two pathogens on apple slices. Low doses of Listeria and Salmonella had been put directly onto apple slices along with the new formula, and the pathogens were found to be inhibited, or completely eliminated, after one, two and three weeks. The research was being conducted at the ARS Produce Quality and Safety Laboratory (PQSL) in Beltsville, Md. That's today's Fruit Grower Report. I'm Greg Martin on the Northwest Ag Information Network.