Integrated Crop Management News

Document Type


Publication Date



Since Asian soybean rust (Phakopsora pachyrhizi) was confirmed in Louisiana on November 10, 2004, a lot of questions have been raised on the impact of Asian soybean rust (ASR) on soybean yield and grain quality. No accurate yield losses due to ASR in the United States can currently be estimated. However, research from around the world has seen yield loss as high as 90 percent under the worst cases. We have summarized what we can expect from ASR on soybean yield and grain quality based on observations from other countries.



File Format





The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit