John Bienapfl

John C. Bienapfl
Department of Plant Pathology
University of Minnesota

495 Borlaug Hall
1991 Upper Buford Circle
St. Paul, MN, 55108

Email: biena003@umn.edu

Graduate Advisors: Dr. Dean Malvick and Dr. James Percich

Root diseases of soybean can have a substantial impact on yield. Multiple fungi have been found associated with soybean roots and some are recognized as important root pathogens of soybean. However, information regarding the distribution of some of these fungi in Minnesota, etiology, and how they may interact in colonizing soybean roots is limited; thus, their importance may not be fully realized. My research involves the characterization of fungi capable of causing root rot on soybean and their potential interactions. In addition, my research involves the identification of factors that may influence the development of root rot, as well as the development of molecular assays to be used for rapid and sensitive detection of soybean pathogens from plant tissue and soil.

Professional Experience

DiLeo, M.V., Bienapfl,  J.C., and Rizzo, D.M. 2007. Phytophthora  ramorum infects hazelnut, vine maple, blue blossom, and manzanita species  in California.  Plant Health Progress (in review).

Ocamb C.M. and J.C.  Bienapfl. 2007. Hop Canker. Compendium of Hop Diseases. APS Press, St. Paul, MN  (in press).

Ocamb C.M. and J.C.  Bienapfl. 2007. Hop Cone Tip Blight. Compendium of Hop Diseases. APS Press,  St. Paul, MN  (in press).

Bienapfl,  J.C., Malvick, D.M., and Percich,  J.A. 2007. Evaluation of PCR-Based Methods for Species-Specific  Detection of Phytophthora sojae.  Phytopathology 97:S.
(Abstract)

Murphy, S., Lee, C, Valachovic, Y., Bienapfl,  J., Jirka, A., Mark, W., and Owen, D. 2007. Monitoring Phytophthora ramorum Distribution in Streams within Coastal  California Watersheds. Sudden Oak Death Second Science Symposium III, Santa Rosa, CA:130.  (Abstract)

Parke, J.L., Bienapfl, J., Oh, E., Rizzo,  D., Hansen, E., Buckles, G., Lee, C., Valachovic, Y. 2006. Natural infection of tanoak seedling roots by Phytophthora  ramorum.  Phytopathology 96:S90. (Abstract)

Bienapfl, J. C., J. W. Zanzot, S. K.  Murphy, M. Garbelotto, and D. M. Rizzo. 2005. Isolation of a new lineage of Phytophthora ramorum from asymptomatic  stems and roots of a commercial lot of rhododendron in California. Phytopathology 95:S9. (Abstract)

Murphy,  S.K., D. M. Rizzo, J. C. Bienapfl, Y.  Valochovic, C. Lee, W. Mark, A. Jirka, T. Smith, D. Owen, and D. Adams. 2005.  Monitoring Phytophthora ramorum distribution in streams within California  watersheds. Phytopathology 95:S72. (Abstract)

Vettraino, A.M., D. Hüberli, S. Swain, J. C. Bienapfl, A. Smith, and M.  Garbelotto. 2005. First Report of Infection of Maiden-Hair Fern (Adiantum jordanii and A. aleuticum) by Phytophthora ramorum in California.  Plant Dis. 90:379.

Bienapfl, J.C., J. W. Zanzot, and D. M.  Rizzo.  2005. Pacific Yew as a Host for Phytophthora ramorum in California  Forests. Sudden Oak Death Second Science Symposium II, Monterey, CA:94.  (Abstract)

Murphy,  S.K., C. Lee, Y. Valachovic, K. R. Falk, J.  C. Bienapfl, H. Patterson, and D. M. Rizzo. 2005. Monitoring Phytophthora ramorum Distribution in  Streams within Coastal California Watersheds. Sudden Oak Death Second Science  Symposium II, Monterey, CA:108. (Abstract)

Valachovic,  Y., C. Lee, D. M. Rizzo, J. C. Bienapfl, S. Murphy, and J. Marshall.  2005. Phytophthora ramorum Research  and Control in North Coastal California. Sudden Oak Death Second Science  Symposium II, Monterey, CA:114. (Abstract)

Bienapfl, J. C., C. M. Ocamb, R. Klein,  and M. Nelson. 2004. Fusarium cone tip blight of Humulus lupulus. Acta hort. (ISHS) 668:123-128.

Bienapfl, J.C., C.M. Ocamb, R. Klein,  and M. Nelson. 2001. Fusarium cone tip blight: A new disease of Humulus lupulus. Phytopathology 91:S9.  (Abstract)

“Wildland  symptom recognition, diagnosis, and sampling of Phytophthora  ramorum.” McClellan/Ukiah/San Luis  Obispo, CA 2006   

“Wildland symptom  recognition, diagnosis, and sampling of Phytophthora ramorum.” Felton/Pleasant Hill, CA  2005

“Symptoms, diagnosis, and sampling for Phytophthora ramorum.”  San Rafael/Felton, CA 2004

“Hop cone tip blight: A new disease in the Pacific Northwest.” M.S. Defense Seminar. Dept. of Botany and Plant Pathology, Oregon  State University 2003

Committees and Organizations

Professional Organizations