Graduate Student Researcher
B.S. University of Maryland, College Park – Plant Science (2009)
M.S. University of California, Davis – Plant Pathology (2013)
Ph.D. University of California, Davis – Plant Pathology (expected 2016)
Area of Specialization:
Mycology; plant disease epidemiology; systems modelling and analysis
My research focuses on the biology, epidemiology, and control of Peronospora effusa, the causal agent of spinach downy mildew disease. Spinach downy mildew affects most cultivable varieties of spinach, and is an especially severe disease in organic crops, which rely heavily on resistance to manage epidemics. Disease has been particularly severe in recent years with the emergence of new pathogen races that have overcome successive resistance genes. I am interested in spatial and temporal patterns of disease, as well as the biology of the causal agent, P. effusa.
R. A. Choudhury, N. McRoberts, K. Kammeijer, S. T. Koike. (2015) Evaluation of biofungicides for control of downy mildew on spinach, 2014. Plant Disease Management Reports. doi:10.1094/PDMR09:V022.
R.A. Choudhury, N. McRoberts, W.D. Gubler, D. Marcum. (2015) Cultivar evaluation for resistance to grape powdery mildew in commercial wine grapes, 2011. Plant Disease Management Reports. doi:10.1094/PDMR09:SMF018.
Choudhury, RA, McRoberts, N, and ST Koike (2015). Field evaluation of materials for controlling spinach downy mildew in organic systems. UCCE Monterey Crop Notes Jan/Feb 2015.
Choudhury, RA, McRoberts, N, and WD Gubler (2014). Effects of punctuated heat stress on the grapevine powdery mildew pathogen, Erysiphe necator. Phytopathologia Mediterranea 53: 148-158.
Peduto Hand, F, Choudhury, RA, and WD Gubler (2014). First report of Cytospora punicae causing wood canker and branch dieback of pomegranate (Punica granatum) in the United States. Plant Disease 98:853.
Choudhury, RA, Modi, P, Hanstad, J, Elkins, R, and WD Gubler (2013). First Report of Diplodia seriata Causing Pear Branch Canker Dieback in California. Plant Disease 98: 688.
Bay, IS, Doody, RW, Nguyen, TN, Choudhury, RA, and WD Gubler. 2011. Evaluation of fungicide programs for management of Botrytis bunch rot of grapes: 2011 field trial.
Presentations at National Meetings
Choudhury, R. A., Koike, S. T., Fox, A., Subbarao, K., Klosterman, S., and N. McRoberts. 2015. Epidemiology of spinach downy mildew in coastal California. Phytopathology 105:S4.176.
Choudhury, R. A., Koike, S. T., Maharaj, N., Leveau, J., and N. McRoberts. 2015. Effect of downy mildew and biofungicides on the phyllosphere of spinach. At Phytobiomes 2015: Designing a New Paradigm for Crop Improvement, Washington D.C.
Choudhury, RA, Koike, S, Subbarao, K, Klosterman, S, and McRoberts, N. 2014. Epidemiology of spinach downy mildew in coastal California. Phytopathology 104:S3.180
Choudhury, RA and McRoberts, N. 2013. Modeling control strategies for maize streak disease. Phytopathology 103: s2.27. Poster here.
Choudhury, RA, McRoberts, N, and Gubler, WD. 2012. Adaptation to heat stress in grapevine powdery mildew. Phytopathology 102: s4.24. Poster here.
Choudhury, RA, McRoberts, N, Mahaffee, W, and Gubler, WD. 2012. Addressing uncertainty in powdery mildew epidemiology. Phytopathology 102: s4.25.
Choudhury, RA, McRoberts, N, Mahaffee, W, and Gubler, WD. 2012. Modeling uncertainty in grapevine powdery mildew. Phytopathology 102: s6.8.
Awards and Recognitions
William Moller Student Travel Award (2016)
Henry A. Jastro Research Award (2015)
James and Mary DeVay Travel Award (2015)
I.E. Melhus Graduate Student Symposium Award (2015)
APS Pacific Division Student Travel Award (July 2014)
Erna and Orville Thompson Travel Award (June 2014)
William Boright Hewitt Scholarship (March 2014)
Henry A. Jastro Research Award (June 2013)
Robert W. Fulton Student Travel Award (April 2013)
Kyung Soo Kim Student Travel Award (April 2013)
Leach Memorial Travel Award (May 2012)
William J. Moller GSR Award (May 2012)
Henry A. Jastro Research Award (April 2012)