Ed Peachey
Associate Professor (Practice), Vegetable Extension and Weed Science

Deliver core information and technology to reduce the economic losses caused by common and invasive weeds of high value horticulture crops in Oregon.

OSU Campus
Department of Horticulture
4017 Ag and Life Sciences Bldg
Corvallis, OR 97331-7304
United States
(541) 737-3152


Weed Biology and Ecology

Effect of crop and tillage rotations on weed seed survival in row crops.
Role of ground beetles in shaping weed communities.
Factors limiting distribution and efficacy of the bindweed mite Aceria mahlerbae
Establishment of Tyta luctuosa for bindweed suppression in the Willamette Valley.

Weed Control Technology: Development and Extension

Weed control in strip-till and conservation tillage corn.
Alternatives to atrazine in sweet corn.
Evaluation of quinclorac and clopyralid for control of bindweed and suppression of Canada thistle in rhubarb, caneberries and blueberries.
Develop weed control strategies for the processed vegetable industry in Oregon in sweet corn, snap beans, table beets, and cucurbit crops.
Identification of candidate herbicides and coordination of herbicide registrations for specialty crops

Sustainable Vegetable Crop Production

Refinement of Pre-sidedress Nitrogen Test (PSNT) in sweet corn.
Strategies and tools to establish wildlife habitat adjacent to agricultural land.
White mold control in snap beans.




Ph.D. Crop Science. Oregon State University, Corvallis, Oregon. July 2004.
M.S. Horticulture. Oregon State University, Corvallis, Oregon. March 1993.
B.S. Horticulture and General Ag. Oregon State University, Corvallis, Oregon. 1986.
A.A. Electronics Technology. Hesston College, Hesston, Kansas. 1976.


Horticultural Senior Research Assistant. Department of Horticulture, Oregon State University. April 1993 to 2005.
Interim Extension Agent for Processed Vegetables. Marion County OR. Nov 1998 to - Nov. 1999.
Graduate Research Assistant. Oregon State University. April 1991 to March 1993.
Agriculture Extension Program Leader. MCC, Dhaka, Bangladesh. June 1989 to November 1990.
Horticulture Advisor. MCC, Dhaka, Bangladesh. November 1987 to June 1989.
Research Assistant. Crop Science Department, Oregon State University, June 1986 to March 1987.
Field Representative. Western Biochemical Consulting Inc., Beaverton, Oregon. April 1985 to September 1985.


I accept graduate students for Horticulture


Brainard, D.C., E. Peachey, E. Haramoto, J. Luna and A. Rangarajan.  2013. Weed ecology and management under strip-tillage:  Implications for Northern U.S. vegetable cropping systems.  Weed Technology 27: 218-230.

Peachey, R.E, D. Doohan, and T. Koch. 2012. Selectivity of fomesafen based systems for preemergence weed control in cucurbit crops. Crop Protection 40: 91-97.

Peachey, R. E. and C. Mallory-Smith. 2011. Effect of fall tillage and cover crop strategies on wild-proso millet (Panicum miliaceum) emergence and interference in follow-crops. Weed Technol. 25:119-126.

Fredrickson*, L., P. A. Skinkis and E. Peachey. 2011. Cover crop and floor management affect weed coverage and density in an establishing Oregon vineyard. Hort Technology 21: 208-216.

Williams, M., R. Boydston, E. Peachey and D. Robinson. 2011. Significance of atrazine as a tank-mix partner with tembotrione. Weed Technol. 3: 299-302.

Williams, M. M., R. Boydston, R. E. Peachey, and D. Robinson. 2011. Performance consistency of reduced atrazine use in sweet corn. Field Crops Res. 121: 96-104.

Peachey, R. E. and C. Mallory-Smith. 2007. Influence of winter seed position and recovery date on hairy nightshade (Solanum sarrachoides) recruitment and seed germination, dormancy, and mortality. Weed Sci. 55:49-59.

Peachey, E., R. L. Ludy, M. L. Powelson, and D. McGrath. 2006. Modification of plant arrangement suppresses white mold of snap beans. HortScience 41:1298-1302.

Peachey, R. E., R. D. William and C. Mallory-Smith. 2006. Effect of spring tillage sequence on summer annual weeds in vegetable row crop. 2006. Weed Technol. 20: 204–214.

Rupp*, D. E., R. E. Peachey, K. Warren, and J. S. Selker. 2006. Diuron in surface runoff and tile drainage from two grass-seed fields. J. Env. Quality. 35:303-311. Qual. 35: 303-311.

Peachey, R. E., R. D. William and C. Mallory-Smith. 2005. Effect of notill or conventional planting and cover crops residues on weed emergence in irrigated vegetable row crops. Weed Technol. 18: 1023-1030. Role: Developed proposal, completed field work, wrote manuscript.

Outreach and Extension

PNW Weed Management Handbook (http://pnwhandbooks.org/weed/).

Peachey, R.E. Avoiding Outlook Herbicide Injury on Golden Delcious Squash.

Peachey, R. E. Using Reflex Herbicide to Control Weeds in Winter and Summer Squash.

Peachey, R. E. and D. Smith. Herbicide Hazards in Hazelnuts.

Greco, A., M. Russell, J. Green, L. Moulton, and E. Peachey. 2012. An Introduction to Ground Beetles of the Willamette Valley. EM 9042. Corvallis, OR: Oregon State University Extension Service.

Peachey, R. E., C. Landgren, and Tim Miller. 2011. Weed and Vegetation Management in Christmas Trees. PNW 625, Oregon State University Extension Service, Corvallis.

Peachey, R. E. Best management practices for weed control in organic snap beans. 2011. EM 9025. Oregon State University Extension Service, Corvallis.

Peachey, R.E. 2011. A New Option for Orchard Floor Management. Newsletter.

Hart, J. M., D. M. Sullivan, J. R. Myers, and E. Peachey. 2010. Nutrient management guide for sweet corn, EM 9010-E, October 2010 (http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/19064/em9010.pdf)

Managing Weeds in Christmas Trees: Two Concepts Worth Remembering. Lookout: Publication of PNW Christmas Tree Growers. Winter, 2011.

Peachey, E. 2006. Puncturevine patrol. EM 8909, Oregon State University Extension Publication.

McGrath, D. and E. Peachey. 2006. Managing 12-Spot Beetles in Snap Beans with Fewer Chemicals and Less Risk of Crop Injury. EM 8906, Oregon State University Extension Publication.

Burrill, L., E. Peachey, and J. Hill. 1988. Time-lapse photography of weeds killed by herbicides. Oregon State University, http://old.wssa.net/Weeds/Tools/Herbicides/HerbicideMovies.htm


Fun Fact

Enjoy making music