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Poster Presentations


Poster Presentations


An update of Asian soybean rust research in Mississippi

Presenter: B. C. Wells

All authors and affiliations: B. C. WELLS (1), G. L. Sciumbato (1), W. F. Moore (2), S. Li (3), M. A. Blaine (2), D. H. Poston (1), R. A. Henn (2), and B. L. Spinks (2). (1) MAFES/DREC, Stoneville, MS 38776; (2) Mississippi State University, MS State, MS 39762; and (3) USDA-ARS, Stoneville, MS 38776

Since the appearance of Asian soybean rust (ASR) in the United States, the Mississippi State University Extension Service, the Mississippi Agricultural Forestry and Experiment Station, and the Mississippi Soybean Promotion Board have joined forces with the U.S. Department of Agriculture and the Bureau of Plant Industry to monitor and control the disease, which has been detected in more than 10 counties in Mississippi since its discovery in the United States on November 6, 2004. In 2006, the sentinel plot system continued with 17 soybean plots planted between March 1 and March 9 being monitored weekly for the appearance of the disease. Producers fields were checked regularly, as were kudzu plots and other legume hosts. Spore traps were also strategically placed across the state in order to detect both rain-washed and airborne spores. Fungicide efficacy, timing, and deposition studies were continued to evaluate the rust approved and experimental fungicides to determine their effectiveness against ASR and other major soybean diseases present in Mississippi and how they best fit into a disease management program. USDA researchers in Stoneville continued efforts to identify and create ASR-resistant germ plasm and develop better DNA selection methods. Currently, more than 500 breeding lines are being evaluated with 20 accessions having been identified with a high level of resistance to the Paraguay ASR isolate. Stoneville has an USDA APHIS PPQ-approved quarantine facility.

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