Field reports indicate that the Rps-1k gene of Phytophthora resistance is no longer as effective as it was few years ago. We plan to conduct a survey to determine what Phytophthora races defeat the Rps-1k gene in Iowa. The first step of this survey is to collect Phytophthora-infected plants. If you have damping-off or plants suspected to be infected by Phytophthora and would like to know whether disease symptoms are caused by Phytophthora damping-off, we can identify samples for you. Please submit diseased plants to the ISU Plant Disease Clinic, c/o XB Yang, Department of Plant Pathology, Iowa State University, Ames, IA 50011. Wrap infected seedlings in tissue paper and put them in a plastic bag so they don't dry out.
Iowa State University
Yang, X. B. and Uphoff, Michael D., "Phythophthora-infected plants needed" (2001). Integrated Crop Management News. 1946.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.