Department Head

Department Head
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Bill Braunworth
Department Head
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In December 2013, Bill Braunworth was named Head of the Department of Horticulture at Oregon State University. He holds the BS in general agronomy (1975) and the MS in Crop Science (1977) from Colorado State University, and the PhD in horticulture (1986) from Oregon State University.


Associate Department Head

Associate Department Head
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Ryan Contreras
Professor, Ornamental Plant Breeding
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Program Overview

My teaching and research focuses on woody nursery and landscape plants. I teach spring and fall woody plant identification courses, growth and development of horticultural crops, and plant propagation. Research in my lab is closely aligned with the nursery industry...


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Christopher Adams
Assistant Professor
541-386-2030 ext 38217
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Tree Fruit Entomology

Nicholas Andrews
Metro Small Farms Extension Agent
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Metro Area Small Farms Extension Agent serving Multnomah, Washington and Clackamas Counties, specializing in Horticulture with a focus on vegetable production and organic methods.

  • Organic Fertilizer Calculator
  • Cover Crop Calculator and Adaptive Cover Cropping...
Neil Bell
Professor (Practice), Community Horticulturalist
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I oversee the Master Gardener program in Marion County and Polk County and work with my volunteers to assist homeowners with their garden problems.

My research interests involve evaluating evergreen shrubs for un-irrigated landscape applications in western Oregon. Since 2001, I have...

Cassie Bouska
Assistant Professor (Practice)
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Charles Bubl
Associate Professor, Staff Chair and Extension Horticulturalist in Agriculture
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Consults on organic or conventional horticultural crops and livestock.

Kristine Buckland
Assistant Professor, Extension Specialist—Vegetable & Specialty Seed Crops
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  • Sustainable agriculture
  • Soil health
  • Nutrient cycling
  • Agricultural systems analysis

North Willamette Research and Extension Center (NWREC)
15210 NE Miley Road
Aurora, OR 97002-9543

Steven Castagnoli
541-386-2030 ext 38220
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Erica Chernoh
Assistant Professor (Practice)
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  • Berries and Small Fruits
  • Tree Fruits
  • Hazelnuts
  • Organic Agriculture
Leonard Coop
Associate Professor (Practice), Associate Director of the Oregon IPM Center
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I support agriculture in general by developing and placing online, weather and climate driven models for numerous areas including IPM/pest models, plant disease risk models, crop models, horticultural models, beneficial species models, climate suitability models, and others. I am Assoc....

Signe Danler
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I support the OSU Extension Master Gardener Program by teaching and managing the online Extension MG training course. I use my experience and training in home horticulture, ecological landscaping and urban forestry to create and teach modules on many subjects for home gardeners. I also design...

Laurent Deluc
Associate Professor, Grape Genomics and Genetic Engineering
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Our group conduct research on functional genomics with a strong emphasis on specialty and cereal crops. We study different aspects of plant biology in the context of a developmental program and in response to abiotic and biotic stresses. Our plant models grapevine, a major fruit crop in U.S....

Amy Jo Detweiler
Professor, Community/Commercial Horticulture, Extension Central Oregon
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I supervise and provide training for the local master gardener program. I work with volunteers to provide community education in home gardening and landscaping. I also provide education to the commercial green industry. 

My main areas of research include educating the community about...

Emily Dixon
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I develop and support online berry classes, including the Pruning and Training of Berries, Kiwifruit, and Grapes series; Blueberry Physiology, Production Systems, and Management; and HORT 456/556: Physiology and Production of Berry Crops. I also produce extension outreach publications for ...

Brooke Edmunds
Assistant Professor (Practice), Community Horticulture Extension
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My focus is on meeting the community horticulture needs in Linn and Benton counties.  In this role, I oversee the Master Gardener programs in each county. I also coordinate research-based educational programs in community food systems and IPM.

Alice Formiga
Assistant Professor (Practice), eOrganic Director
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Alice Formiga leads the eOrganic Community of Practice at

Kelsey Galimba
Assistant Professor of Tree Fruit Horticulture
541-386-2030 ext 38218
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Dr. Galimba's research program encompasses all aspects of both pear (Pyrus communis) and sweet cherry (Prunus avium) orchard production systems, with specific emphasis on optimizing yield and fruit quality in these two crops. Current projects include the development of a...

Amy Garrett
Assistant Professor (Practice), Small Farms Program
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Instructor for the OSU Extension Service Small Farms Program serving Benton, Linn, and Polk counties.

Anne Gearhart
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Louisa Hooven
Assistant Professor (Senior Research)
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Alec Kowalewski
Associate Professor, Turf Specialist (Giustina Endowed)
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Turf Program Overview 

The primary goal of my extension and outreach program, which is funded by the Giustina Turf Endowment, is improving the environmental and economic sustainability of turfgrass management.  Topics of interest related to this include, utilization of sustainable...

John Lambrinos
Associate Professor
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We are beginning to understand that interactions between landscape elements underlie many of the important issues we face as a human society. I am fascinated by the ecological processes that tie landscapes together.

  • On-farm habitat restoration.
  • Habitat for...
Gail Langellotto
Professor, Urban and Community Horticulture Extension, Statewide Master Gardener Program Coordinator
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The ecology of urban and suburban landscapes remains relatively unexplored - although such habitats have great potential to positively contribute to the conservation of pollinators, parasitoids and the ecosystem services that they confer. 

Working with the OSU Extension Master...

Alexander Levin
Assistant Professor, Viticulturist
541-772-5165 ext. 223
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  • Wine grape research
Danielle Lightle
Assistant Professor (Practice)

Scott Lukas
Assistant Professor
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The OSU Horticulture Integrated Cropping Systems Program focuses on providing research based solutions to high value irrigated crops, with an emphasis on optimizing production system outputs while reducing negative environmental impacts.

Hermiston Agricultural Research and Extension...

Maud Macrory Powell
Associate Professor (Practice)
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Extension Small Farms
Jackson County

Shawn Mehlenbacher
Professor, Hazelnut Breeding and Genetics
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The OSU Hazelnut Breeding program develops new cultivars for Oregon's hazelnut industry, with an emphasis on resistance to eastern filbert blight (EFB) and suitability for the kernel market.

Plant Breeding: Develop new cultivars for Oregon's hazelnut industry, with emphasis on...

Andony Melathopoulos
Assistant Professor - Pollinator Health Extension
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I have wide interests in the area of keeping native and managed bees healthy in working and natural landscapes. 

A major area of my work focuses on how pesticide applicators understand the risks associated with pest management decisions. This has taken the form of large scale...

Betsey Miller
Instructor, Ecampus and Research Assistant, IPM (Walton Lab)
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I teach an undergraduate course in entomology. My goal in teaching entomology to non-entomologists is to provide insight into a group of organisms that is largely ignored. The vast and varied world of insects impacts human society more than we think.

My IPM research...

Weston Miller
Associate Professor (Practice)
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Consumer Horticulture

Clackamas County Extension
200 Warner Milne Rd
Oregon City, OR 97045

Andrew Millison
Senior Instructor I, Permaculture
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Permaculture for climate change resilience, water management for broad scale farm planning, Permaculture housing developments, and water law for obtaining water rights in Oregon.

Marcelo Moretti
Assistant Professor
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  • Weed Science
  • Perennial Crops
  • Integrated Weed Management
  • Sustainable Agriculture

4017 Agriculture & Life Sciences Building

James Myers
Professor, Vegetable Breeding and Genetics
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We develop improved vegetable varieties with the main focus being to support gardeners, growers and processors in the Pacific Northwest (PNW). This region of the United States has a unique growing environment, and varieties developed elsewhere may not necessarily be optimally adapted to the...

Lloyd Nackley
Assistant Professor, Nursery Production
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My research and teaching program investigates how light, nutrients, water, potting media and container-type, affect plant growth, development, and aesthetics.


Dr. Lloyd Nackley is a plant physiological ecologist who brings a systems approach to nursery and greenhouse...

Hiroyuki Nonogaki
Associate Professor, Seed Biology
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The current research in the Integrative Seed Biology Program at Oregon State University focuses on the fundamental question: how do plant seeds germinate? We try to elucidate the mechanism of seed germination using biochemical and...

Ed Peachey
Associate Professor (Practice)
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Ed works in the Horticulture Department at OSU in research and extension. His focus is vegetable crop production including processed, fresh market and seed crops, with an emphasis on weed and pest management in all of these crops. Projects managed by his team include an initiative to improve...

Stephen Renquist
Associate Professor, Extension Horticulturist, Douglas County
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  • Viticulture and marketing for wine grape growers of the Umpqua Valley
  • Pest management, IPM systems with Tree fruit and wine grape growers
  • Nursery and Landscape issues
  • Master Gardener Program and urban horticulture

1134 S.E. Douglas...

Robin Rosetta
Retired Nursery Integrated Pest Management Extension Agent
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  • Biological control implementation
  • Pacific Northwest Nursery IPM website development and expansion
  • Current research areas include: Intelligent Spray Systems; Azalea lace bug; and Maple spider mite.
  • Career-long research topics include: Assessment of...
Sara Runkel
Assistant Professor (Practice)
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  • Horticulture
  • Small Farms
  • Local, Regional, and Community Food Systems
  • Vegetables
Ramesh Sagili
Associate Professor-Apiculture
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To promote sustainable apiculture and pollination, our research program focuses on three prime areas: (1) honey bee health (2) honey bee nutrition and (3) honey bee pollination. Our research program addresses both basic and applied questions to improve honey bee health and...

Nicole Sanchez
Assistant Professor (Practice)
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Home and Small-scale Commercial Horticultural Production and Management Issues

Lane Selman
Assistant Professor (Practice)
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Lane Selman grew up on a citrus farm on Florida's space coast where her Sicilian great-grandparents settled in the 1920s.  She has a Bachelors degree in Agronomy and a Masters in Entomology, both from the University of Florida.  She moved to Oregon in 2001 and since 2005 has been an...

Alan Shay
Senior Instructor I
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My area of focus within the Horticulture Department is sustainable horticultural solutions for the residential and commercial landscape.

I currently teach Landscape Design, (Hort 380), Landscape Maintenance, Conservation and Restoration, (Hort 315), Sustainable Landscape Construction...

Govinda Shrestha
Hemp specialist, SOREC
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  • Integrated Pest Management
  • Insect Ecology-Movement
Patricia Skinkis
Professor, Viticulture Extension Specialist
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Dr. Skinkis' research program focuses on whole plant physiology studies that are designed to understand vine vegetative vigor management, physiology of vine balance, and vineyard management impacts on fruit composition and wine quality. Her research also includes work on yield management, fine...

Toni Stephan
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Deschutes Co Office

Tim Stock
Senior Instructor II, Director of the OSU School IPM Program
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  • Integrative Extension Program Development
  • Participatory Training and Assessment
  • Capacity Building
  • Integrated Pest Management (Schools, Sensitive Sites, Agriculture)

Currently leading the OSU School IPM Program, which works with...

Alexandra Stone
Associate Professor, Ext Vegetable Crop Specialist
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I have been investigating the use of the biological control agent commercially available as Contans (Coniothyrium minitans) as a control for white mold of vegetables, especially snap beans grown by processed vegetable growers. This project has been supported by grants from Western...

Heather Stoven
Assistant Professor (Practice)
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As the Community and Small Farms Horticulturalist for Yamhill County, I oversee the Master Gardener program and provide support to the community's gardening and small farm needs. I have experience in the nursery industry, working in propagation, pest management, media preparation, fertility...

Bernadine Strik
Professor, NWREC Berry Crops Research Leader
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Oregon has a diverse, economically important berry crop industry with about 24,000 acres harvested for a farm gate value of over $200 million. Berry crops, including blueberry, blackberry, raspberry, strawberry, cranberry, and kiwi fruit, are grown on over 1000 family farms in Oregon....

Ashley Thompson
Assistant Professor, Extension Horticulturist
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Kelly Vining
Assistant Professor
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My research integrates the powerful tools of genomics and bioinformatics with plant breeding. I work with a variety of crops important to the Pacific Northwest region of the United States, including mint, hemp, hazelnut, black raspberry, and potato. Common research themes are identification of...

Sugae Wada
Assistant Professor (Senior Research)
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Expertise research areas in Plant Science


Horticulture, Botany & Plant Pathology, Plant Anatomy & Systematics, Seed Biology &Technology, Weed Science

Plant Tissue Culture & Cryopreservation: In vitro Plant...

Vaughn Walton
Professor, Horticultural Entomologist
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  • Entomology
  • IPM
  • Biorational pest control agent
  • Biological control
  • Small fruit and tree nut crops

I work on economically important pests, with the aim to provide environmentally sustainable and minimal impact pest...

Timothy Warren 541-737-7557
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Nik Wiman
Associate Professor, Extension Specialist—Orchard Crops
503-678-1264 X 67825
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  • biological control
  • population biology
  • orchard ecology
  • insect behavior
  • integrated pest management

Nik earned a BS (biology) and MS (entomology) from Montana State University where he worked on biological control of weeds...

Wei Yang
Associate Professor, Blueberry Extension Agent
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My responsibility is to provide leadership for the blueberry education program in the North Willamette District where the most of the state’s blueberry industry is concentrated. I also conduct applied research in blueberry production systems to support my extension activities.