An article in the June 3, 2002, Integrated Crop Management newsletter, page 91, described the use of acetic acid (vinegar) as a tool for controlling weeds. This article prompted a number of questions from growers and agribusiness personnel in Iowa. As a result of these questions, I contacted the USDA researchers that conducted the work and also checked a number of sites on the Web for information. The information below is from discussions with the researchers Dr. John Teasdale and Dr. Jay Radhakrishnan, and publicist Don Comis, and it is reported at several Web sites, including The "Vinegar as an Herbicide" Information Page andSpray Weeds with Vinegar?