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Featured Resources

2024 Pest Management Guide for Tree Fruits: Hood River, The Dalles, White Salmon, Rogue Valley, Umatilla County

This guide provides tree fruit growers with the latest information on pesticides and herbicides for fruit trees. People who grow apples, pears and cherries can learn application rates and recommendations for each stage of tree growth.

Ashley Thompson, Rick Hilton, Achala KC, Marcelo Moretti, Jay W. Pscheidt, Nik Wiman, Christopher Adams, Andony Melathopoulos, Cody Copp | May 2024 | Extension Catalog publication

Best practices for produce safety after a wildfire (in English)

When assessing the safety of exposed produce, the difficulty is knowing what has been burning. If it is just vegetation smoke then it’s probably safe to eat produce after rinsing off the ash, although it might still taste/smell smoky. If the air pollution has particulate matter from treated timber, tires, non-food grade oils, or anything plastic or chlorinated that burned it may include a mixture of Polycyclic Aromatic Hydrocarbons (PAHs), dioxins, and metals. Exposure to fire retardant may have also occurred.

Sep 2020 | Online resource

Latest News

Get a leg up on fruit tree problems with dormant oils

Applying dormant sprays helps control nasty pests and diseases like codling moths and apple scab.

Kym Pokorny | Dec 14, 2023 | News story

OSU’s Olea Project responds to grower interest in producing olives

The project began in earnest in 2017 to determine if olives could be a viable alternate crop in Oregon.

Kym Pokorny | Dec 8, 2023 | News story

Training a fruit tree into an espalier takes a good dash of dedication

Turn a tree into a space-saving specimen with some tips from an OSU Extension expert

Kym Pokorny | Jul 10, 2023 | News story

All News

Sweet Cherry Cultivars for the Fresh Market

Ashley Thompson Matthew Whiting and Lynn E. Long

This publication describes dark red and blush sweet cherry cultivars, including harvest timing, color when ripe, suggested pollinizers and rootstocks, size, firmness, yield potential, and other traits. Includes color photo of each cultivar.

View Publication
Photo Credit: Suzi - Adobe Stock (Cropped from original)

Cherry Resources

2021Cemetery Block Cherry Variety Evaluation (in English)

2021 fruit characteristics of sweet cherry cultivars and selections under evaluation in The Dalles at the Cemetery Block. All data was evaluated from 25 samples of each cultivar.

Lynn Long, Ashley Thompson, David Crawford, Pamela Manning | May 2022 | Educational document

Sweet Cherry Rootstocks for the Pacific Northwest

Cherry growers have many options when it comes to choosing rootstocks. The combination of new dwarfing rootstocks with high-density training systems leads to earlier production. But growers need to consider soil ...

Lynn Long, Clive Kaiser, Ashley Thompson | Sep 2021 | Extension Catalog publication

How to Spot Signs of X-Disease in Cherries

Field workers picking cherries can use this card to identify signs of X-Disease in a cherry orchard. One side of the card is in English and the other side is in Spanish. Los trabajadores de campo que ...

Ashley Thompson | Mar 2020 | Extension Catalog publication

Integrated Pest Management Strategic Plan for Pears in Oregon and Washington

Katie Murray Paul C. Jepson and Chris Hedstrom

This publication outlines major pests, current management practices, critical needs, activity timetables and efficacy ratings of various management tools for pear growers in Oregon and Washington.

View publication
Credit: westermak15 - Adobe Stock (Cropped from original)

Apple and pear resources

2023 Pest Management Guide for Apples: Willamette Valley

Learn the latest recommendations for insect, mite and disease control in Willamette Valley apple orchards.

Nik Wiman, Jay W. Pscheidt, Marcelo Moretti | Apr 2023 | Extension Catalog publication

Extension’s experimental cider orchard to boost budding Oregon industry

The orchard, established at Oregon State University’s North Willamette Research and Extension Center – 23 miles south of downtown Portland – is the brainchild of Nik Wiman, OSU Extension orchard crops specialist.

Kym Pokorny | Jan 12, 2021 | News story

Know when it’s time to harvest apples and pears

Apples and pears have different characteristics when it comes to harvest.

Kym Pokorny | Sep 18, 2020 | News story

2022 Pest Management Guide for Peaches

By Nik Wiman Jay W. Pscheidt and Marcelo Moretti

Get the latest recommendations for insect, mite and disease control in peach orchards of the Willamette Valley.

View publication
Photo Credit: Dionisvera - Adobe Stock (Cropped from original)

Latest Resources

2024 Pest Management Guide for Tree Fruits: Hood River, The Dalles, White Salmon, Rogue Valley, Umatilla County

This guide provides tree fruit growers with the latest information on pesticides and herbicides for fruit trees. People who grow apples, pears and cherries can learn application rates and recommendations for each stage of tree growth.

Ashley Thompson, Rick Hilton, Achala KC, Marcelo Moretti, Jay W. Pscheidt, Nik Wiman, Christopher Adams, Andony Melathopoulos, Cody Copp | May 2024 | Extension Catalog publication

Pest management schedule for peach, nectarine, and apricot trees in Eastern Oregon (in English)

This document outlines a suggested management schedule for the most common insect pests and diseases of apple trees in Eastern Oregon.

Cody Copp | Mar 2024 | Educational document

National Clonal Germplasm Repository: Corvallis (in English)

The National Clonal Germplasm Repository (NCGR) at Corvallis, Oregon, is a gene bank that preserves invaluable plant genetic resources of temperate fruit, nut, and agronomic crops. This gene bank maintains collections representing global diversity of hazelnuts, strawberries, hops, pears, currants, mint, gooseberries, raspberries, blackberries, blueberries, ligonberries, cranberries, quince, serviceberry, butternut, medlar, and mountain ash.

Jan 2024 | Online resource

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Meet Our Experts

Heather Andrews
Orchard Crops Faculty Research Assistant
Logan Bennett
Small Farms and Master Gardener Program Coordinator

Contact for Farming and Gardening Questions in Douglas County

Erica Chernoh
Horticulture Assistant Professor of Practice, Commercial and Community Horticulture
Cody Copp
Assistant Professor of Practice

Contact me for questions related to commercial and home horticulture in Umatilla County and Eastern Oregon.

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“Pregúntale a Extensión” es una forma de obtener respuestas del Servicio de Extensión de Oregon State University. Contamos con expertos en familia y salud, desarrollo comunitario, alimentación y agricultura, temas costeros, silvicultura, programas para jóvenes y jardinería.

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White spots from watering with hard water?

P: I’ve been suspecting for the last few years that a large problem for our garden and orchard is our hard water. Once I start introducing water from our irrigation, after the spring rains have dried up, the leaves curl, ...

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