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Posted 24 November 2004. PMN Crop News.

Soybean Fungus Present In Arkansas

Animal and Plant Health Inspection Service
United States Department of Agriculture

Washington, D.C. (November 22, 2004) - A suspected soybean leaf sample screened at the University of Arkansas' plant diagnostic laboratory on Nov. 18 has tested positive for Phakopsora pachyrhizi, or soybean rust, at USDA's National Plant Germplasm and Biotechnology Laboratory in Beltsville, Md., over the weekend, a USDA official said.

Researchers at the Beltsville testing facility said on Saturday the sample was morphologically positive and was validated using polymerase chain reaction testing. The number of confirmed soybean rust infected areas in the southeast United States now stands at 16.

While surveying areas in Crittenden County, Ark., a county extension specialist collected a soybean leaf sample with lesions consistent with soybean rust. The sample was screened at the University of Arkansas, and then sent to the NPGBL on Friday.

The University of Arkansas plant diagnostic laboratory is part of USDA's National Plant Diagnostic Network. The NPDN is made up of experts from the nation's land-grant universities. Scientists and researchers in the network provide a cohesive distribution system to quickly detect pests and pathogens that can pose a threat to U.S. agriculture.

The NPDN consists of five regional centers, each responsible for managing the states in that region.

For more information on the NPDN, please visit .