Soybean rust was reported in Matagorda County, Texas (7/30). It was also reported on soybean in a second county in a soybean sentinel plot in Arkansas - Hempstead County (7/27); along with five counties (Bowie, Delta, Lamar, Navarro, and Red River Counties) in commercial soybean fields in Texas (7/26 and 7/27). Some of these reports are from multiple fields within a county.

Two counties in Oklahoma (Bryan and Choctaw) were confirmed to have soybean rust on July 26th. This is the most northern occurrence of soybean rust in 2007. Both counties border Texas and are just west of Little River County Arkansas that was positive for rust on July 23rd.

In 2007, rust has been reported in five counties in Alabama (one soybean), two counties in Arkansas (soybean), 10 counties in Florida (one soybean), five counties in Georgia (all kudzu), six parishes in Louisiana (five soybean), one county in Mississippi (kudzu), two counties in Oklahoma, and 21 counties in Texas (20 soybean). Weather conditions have been favorable for rust development in many parts of the south and to the states just north of the gulf states.

Minnesota Report: The risk of soybean rust continues to appear to be low in Minnesota. Dry weather is continuing over much of the state and is reducing the risk of soybean rust and other foliar diseases. Bacterial blight, Septoria brown spot, and iron deficiency chlorosis have been reported in some fields and sentinel plots in MN. Soybean aphids have been detected in many sentinel plots and commercial fields. IF soybean rust expands in the area of Lousiana, Texas and adjoining states, THEN scouting could become recommended in some areas of Minnesota IF a prolonged wet period occurs. Until that happens, there appears to be no clear need for widespread scouting of commercial fields in Minnesota.

For more information:

http://www.sbrusa.net/