Some peaches shipped to U.S. retailers contained higher pesticide levels than the U.S. permits, and some had been sprayed with pesticides not approved for use in the U.S.

Those are among the findings of an upcoming study by the U.S. Department of Agriculture, according to an Aug. 12 story in the Chicago Tribune.

More than 50 pesticides were found on domestically-produced and imported peaches inspected by USDA for its study, according to the story. Five of those pesticides were found in levels exceeding limits set by the Environmental Protection Agency, and six of them are not approved for use on peaches in the U.S.

Most peaches surveyed by USDA, however, contained pesticide levels well below EPA limits, according to the story.

The California Tree Fruit Agreement, Reedley has issued a response to the Tribune story, and the group's full response is on its Web site.