Phytophthora root and stem rot (PRSR), caused by the soil-borne fungus Phytophthora sojae is a common disease found throughout the United States. PRSR has been ranked as a leading destructive soybean disease reportedly causing an annual loss of over 44 million bu from 1996-2009 (Koenning and Wrather, 2010; Wrather and Koenning, 2009).
The NAGC is developing a test that allows for the identification of the Phytophthora pathogen that will allow ND soybean producers to quickly (within 4 weeks once the sample reaches the lab) identify the Phytophthora pathogen. An accurate course for remediation can then be determined. It can also be an indicator of what soybean producers might expect in a particular field the following year.