Northeast Research and Demonstration Farm
During the 2005 and 2006 growing seasons, soybean rust was not a threat for Iowa soybean growers. This year was a different story, as soybean rust was established fairly early in the season in Texas and Louisiana creating the potential for soybean rust to get to Iowa during the growing season. Soybean rust was not found while soybean plants were in a vulnerable stage; however, soybean rust was found in Iowa on September 25, 2007. Since the initial find, soybean rust was confirmed in 13 additional counties.
Iowa State University
Mueller, Daren S., "Soybean Rust Reaches Iowa" (2008). Iowa State Research Farm Progress Reports. 756.