Distribution of Phakopsora pachyrhizi in the USA in 2007
Since its first discovery in Louisiana in 2004 (see EPPO RS 2005/029), Phakopsora pachyrhizi (EPPO Alert List) has spread widely within the USA. The results of the 2007 surveys indicate that the Asian soybean rust is present in the following 19 states on continental USA (334 counties) and in Hawaii. In 2007, P. pachyrhizi spread towards the north and west, and it was found for the first time in Iowa, Kansas, Nebraska, and Oklahoma (so far, it has not been found in Ohio). In most areas in the Midwest and plains regions, soybean rust appeared late in the season and therefore did affect production.
Distribution in the USA in 2007:
Alabama (found in 40 counties), Arkansas (33 counties), Florida (24 counties), Georgia (51 counties), Hawaii (no details), Illinois (4 counties), Indiana (1 counties), Iowa* (14 counties), Kansas* (9 counties), Kentucky (3 counties), Louisiana (21 parishes), Mississippi (26 counties), Missouri (37 counties), Nebraska* (4 counties), North Carolina (6 counties), Oklahoma* (12 counties), South Carolina (7 counties), Tennessee (7 counties), Texas (26 counties), Virginia (9 counties).
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* New state records.
Sources
USDA – Integrated Pest Management – Pest Information Platform for Extension and Education. http://www.sbrusa.net/cgi-bin/sbr/public.cgi
Purdue University. Plant and Pest Diagnostic Laboratory. Asian soybean rust. Phakopsora pachyrhizi. http://www.ppdl.purdue.edu/PPDL/soybean_rust.html