Joel Felix
Associate Professor, Weed Science

My research program focuses on development and support of weed management tactics that address grower economic growth while enhancing environmental stewardship for a viable and sustainable agriculture. I believe that understanding weed biology and ecology is a key to effective weed management in agricultural fields. Currently, we have ongoing studies on weed management in dry bulb onions, sugar beets, corn, potato, alfalfa, and dry beans in the irrigated fields of Eastern Oregon.

Malheur Agricultural Experiment Station
Department of Crop and Soil Science
595 Onion Ave
Ontario, OR 97914
United States
(541) 889-2174



- Ph.D., Crop Production and Physiology (Weed Science), Iowa State University, Ames, IA, USA
- M.S., Crop Production and Physiology (Weed Science), Purdue University, W Lafayette, IN., USA
- B.S., Soil and Crop Management, Purdue University, W Lafayette, IN., USA
- Diploma (with distinction), Crop Production, Uyole Agricultural Training Institute, Mbeya, Tanzania
- Certificate in Agriculture, Crop and Animal Prodn, Maruku Agric Training Inst., Bukoba, Tanzania

Professional Affiliatons:

Weed Science Society of America (WSSA), 1992 to present
North Central Weed Science Society (NCWSS), 1992-2007
Western Society of Weed Science (WSWS), 2007 to present
American Society of Agronomy (ASA), 2008 to present
Oregon Society of Weed Science (OSWS), 2007 to present

I accept graduate students for Crop and Soil Science


Boydston, R., J. Felix, and K. Al-Khatib. 2012. Preemergence herbicides for potential use in potato (Solanum tuberosum) production. Weed Technology 26:731-739.

Felix, J., S.A. Fennimore, and J.S. Rachuy. 2012. Response of alfalfa, green onion, dry bulb onion, sugar beet, head lettuce, and carrot to imazosulfuron soil residues two years after application. Weed Technology 26:769-776.

Felix, J., R. Boydston, and I.C. Burke. 2012. Response of direct-seeded dry bulb onion to simulated glyphosate drift with variable rates and application timings. Weed Technology 26:747-756.

Wedryk, S., J. Felix, D. Doohan, and J. Cardina. 2012. Strategies for weed suppression and improving soil fertility during transition to organic vegetable production. HortTechnology 22:207-214.

Doohan, D. and J. Felix. 2012. Crop response and control of common purslane and prostrate pigweed in green onion with oxyfluorfen. Weed Technology 26:714-717.

Wortman, S.E., A.S. Davis, B.J. Schutte, J. Lindquist, J. Cardina, J. Felix, C.L. Sprague, A. Dille, A.H.M. Ramirez, G. Reicks, and S. Clay. 2012. Local conditions, not spatial gradients, drive demographic variation of Ambrosia trifida and Helianthus annuus across northern US maize belt. Weed Science. Weed Science 60:440-450.

Felix, J. and G. Newberry. 2012. Yellow nutsedge control and reduced tuber production with s-metolachlor, halosulfuron plus dicamba, and glyphosate in furrow irrigated corn. Weed Technology 26:213-219.

Felix, J., J. Dauer, A.G. Hulting, and C. Mallory-Smith. 2012. Yellow nutsedge growth and tuber production in response to increasing glyphosate rates and selected adjuvants. Weed Technology 26: 95-101.

Felix, J., R. Boydston, and I. Burke. 2011. Potato response to simulated glyphosate drift. Weed Technology 25:637-644.

Felix, J. 2011. Response of dry bulb onion, sugar beet, and pinto beans to imazosulfuron soil residues. Weed Technology 25:586-590.

Felix, J. and R. Boydston. 2010. Evaluation of Imazosulfuron for Yellow Nutsedge (Cyperus esculentus) and Broadleaf Weed Control in Potato. Weed Technology 24:471-477.

Felix, J., J. Ivany, G. Kegode, D. Doohan. 2009. Using WeedCast Prediction Model to Determine Potato Cultivation Timing.  Weed Science 57(1):87-93.

Felix, J., D. J. Doohan, and D. Bruins. 2007. Differential vegetable crop responses to Mesotrione soil residues a year after application.  Crop Protection 26:1395-1403.

Ciuberkis, S., S. Bernotas, S. Raudonius, and J. Felix. 2007.  Effect of Weed Emergence Time and Intervals of Weed and Crop Competition on Potato Yield. Weed Technol 21:213-218.

Felix, J., D. J. Doohan, S. C. Ditmarsen, M. E. Schultz, T. R. Wright, B. R. Flood, and T. L. Rabaey.  2005.  Effect of flumetsulam plus clopyralid soil residues on potatoes (Solanum tuberosum L.), lima beans (Phaseolus limensis, L.) and snap beans (Phaseolus vulgaris L.) grown in rotation. Crop Protection 24: 790-797.

Felix, J. and D. J. Doohan. 2005.  Response of Five Vegetable Crops to Isoxaflutole Soil Residues.  Weed Technol 19: 391-396. 

Felix, J. and M. D. K. Owen.  2004.  Weed Seedbank Comparison in Conservation Reserve Program and Adjacent Fields Under Continuous Cultivation.  Weed Technol. 18:45-51. 

Felix, J., D. J. Doohan, S. C. Ditmarsen, M. E. Schultz, T. R. Wright, B. R. Flood, and T. L. Rabaey.  2002.  Sensitivity of Sweet Corn and Potatoes to Cloransulam-Methyl Soil Residues.  Crop Protection 21:763-772. Doohan, D.J,

Felix, J., J. Jasinski, C. Welty, and M. D. Kleinhenz.  2002.  Insect Management and Herbicide Tolerance in Near-Isogenic Sister Lines of Transgenic and Non-Transgenic Sweet Corn.  Crop Protection 21: 375-381. 

Felix, J. and M. D. K. Owen.  2001.  Weed Seedbank Dynamics in Post Conservation Reserve Program (CRP) Land. Weed Science 49(6): 780-787.

Felix, J. and M. D. K. Owen. 1999. Weed population dynamics in land removed from the conservation reserve program. Weed Science 47(5): 511-517. 

Appa-Rao, S.; G. M. Mitawa, J. Felix, and M. H. Mengesha.  1988.  Collecting pearl millet germplasm in Tanzania.  Plant-Genetic-Resources-Newsletter Sep-Dec 1988 no. 75-76: 40-41.