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19

Diagnosing soybean rust: Options and availability in 2007

Presenter: Carrie Lapaire Harmon(1)

Other authors and affiliations: Philip F. Harmon(2). (1)Southern Plant Diagnostic Network, University of Florida, Plant Pathology, Gainesville, FL 32611, U.S.A.; (2)University of Florida, Plant Pathology, Gainesville, FL 32611, U.S.A.

Asian soybean rust (Phakopsora pachyrhizi) is a serious yield-reducing fungal disease of soybean. Early detection has been continuously emphasized to increase management options; earlier detection generally allows for use of a wider range of efficacious fungicides, both preventative and systemic. When Asian soybean rust was detected in the continental United States in fall of 2004, a few detection methods were available to diagnostic and research laboratory personnel. Field detections were limited to hand lens and microscopic observations. Since then, several new methods for laboratories and field-friendly diagnosis have become available, including streamlined PCR and improved immunological kits for the field. In addition, field and lab workshops in the southeast and across the country have increased the number of trained personnel who are capable of field and laboratory detection of the disease, as well as differentiating the rust from other common diseases of soybean.

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