Update on Fungicides for Use on Soybean

May 20, 2008
ICM News

By Daren Mueller, Department of Plant Pathology

There have been some changes in the availability of fungicides for soybean. Here is a quick summary.

Alto® (cyproconazole, Syngenta Crop Protection) has been fully registered for use on soybean by EPA. The product will be available for use on soybean in Iowa when the new label is approved by the state. Until then, this product will only be available through its Section 18 label for soybean rust.

ProlineTM (prothioconazole, Bayer CropSciences) has been fully registered for use on soybean. Although registered, Bayer will not be pushing this product for soybean in 2008, but it is available. The only diseases listed on the label for soybean are soybean rust and powdery mildew. This product also is available for wheat. 

CarambaTM (metconazole, BASF) will NOT be available for use on soybean as a Section 3 product. It still has a Section 18 label for this season for soybean rust, but once the Section 18 is expired this product will only be for use on small grains.

MultivaTM (metconazole + pyraclostrobin, BASF) was recently approved by EPA, but like CarambaTM, will not be available for use on soybean. This product will be available for small grains.

Folicur®, OriusTM and UppercutTM (tebuconazole products) are still expecting Section 3 registration during 2008 season. However, as a backup plan, a Section 18 application will be submitted to renew the expired tebuconazole Section 18 label.  Bottom line, the label status for these products is still up in the air for 2008, so stay tuned.

For a complete list of available products for soybean rust, see Using Foliar Fungicides to Manage Soybean Rust  – Appendix B.


Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on May 20, 2008. The information contained within may not be the most current and accurate depending on when it is accessed.


Daren Mueller Professor

Daren Mueller is an associate professor and extension plant pathologist at Iowa State University. He is also the coordinator of the Iowa State Integrated Pest Management (IPM) program. Daren received his bachelor's degree from the University of Wisconsin-Madison in 1996, and his master's degree a...