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On July 25, 2006, Asiatic Soybean Rust was confirmed in Gadsden County, Florida on a Group III variety at stage R6 (full sized beans) at all three sentinel plot locations in the county. Group V (stage R5) and VII (stage R3) varieties in the same plots apparently show no symptoms yet.
Soybean rust was confirmed at a Brooks County, Georgia site on July 24, 2006. None of the state's soybean production is closer than 300 miles from the Georgia site. Asiatic soybean rust was confirmed a little closer to North Carolina with the find on July 20 of rust on soybeans in Brooks County, Georgia, in south-central Georgia, on the Florida border. It was found on a maturity group III variety planted in March.
Florida and Georgia were very dry early in the summer and this has limited the development of rust in these locations. The development of soybean rust is at least a month behind what we experienced in 2005. Recent rains in Florida and Georgia will provide a favorable environment for development of soybean rust in those areas. Since 2006 soybean production in Florida and Georgia is estimated at only about 155,000 acres, high numbers of spores are not anticipated coming from soybean at this time. Although rust is likely to spread over the next several weeks to the South of North Carolina, long distance spread is unlikely since sources of spores are still weak. For more information about this update or to read more North Carolina pest alerts, see the North Carolina Pest News.
For more information contact Steve Toth, NCSU
Email: steve_toth@ncsu.edu
Phone: 919-513-8189
http://ipm.ncsu.edu/current_ipm/pest_news.html