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North Willamette Research and Extension Center

Photo: Judy Kowalski (Cropped from original)

Este contenido ha sido traducido automáticamente. El servicio de Extensión de Oregon State University (OSU) no garantiza la exactitud del texto traducido. Consulte la versión original en inglés para confirmar la información.

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Hazelnuts and tree fruits

The Willamette Valley is well suited to production of orchard crops. The valley is the birthplace of the Pacific Northwest cherry industry (Milwaukie, OR), and once held vast acreage of walnut and prune orchards. There have always been some commercial apple, pear and peach orchards, and niche orchard crops such as persimmons, fig and Asian pears also produce well here. Currently, the dominant commercial orchard crop is European hazelnut (Corylus avellana) with more than 70,000 acres in the valley now dedicated to production. This is a unique nut industry. Oregon produces most of the domestic supply of hazelnuts and some of the highest quality nuts in the world.

We work closely with the industry to help solve problems related to hazelnut production.

The North Willamette Research and Extension Center is home to the Orchard Crops Research and Extension Program led by Dr. Nik Wiman, which has the mandate to provide applied research and Extension for the Oregon hazelnut industry. This includes research on:

  • Insect pests (including the invasive brown marmorated stink bug) and beneficials
  • Nutrient management
  • Irrigation management
  • Emerging disease issues

We also work with other orchard crops including peaches, almonds and cider apples. We offer a number of workshops in any given year covering topics such as pruning, pest management and cover crops.

Photo by Betsy Hartley (Cropped from original)
Nik Wiman, OSU extension hazelnut specialist.
Credit: Stephen Ward

Managing Eastern Filbert Blight in Oregon

Watch a short educational video about this fungal canker disease of hazelnut that threatens production in Oregon but can be managed. Then read more to learn the disease life cycle, the symptoms and signs of infection, management techniques, and how to report aggressive canker growth that can be useful as new information emerges.

Learn what can be done

Our Projects

Brown Marmorated Stink Bug (in English)

Portal for information about BMSB and to report a sighting.

May 2019 | Online resource

Hazelnut Applied Research and Extension (in English)

Information on how to support the Orchards Program and their research efforts.

May 2024 | Online resource

Wiman Lab (in English)

Current research includes IPM for new and old hazelnut pests, hazelnut nutrition, hazelnut water use/irrigation, and cider apple production. Primary interests are population biology of insects, biological control, sustainable orcharding and grower outreach.

Nik Wiman | May 2019 | Online resource

  • The Orchard Program also grows a variety of peaches, nectarines and almonds at the NWREC.

    Photo: Nik Wiman

  • After dropping to the ground, hazelnuts are swept into rows, and then collected by machines.

    Photo: Nik Wiman

Browse related Extension resources

Meet our expert

Nik Wiman
Orchard Crops Specialist

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