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Tree Fruit

Tree Fruit Research and Extension

WSU Tree Fruit Research and Extension develops and applies research-based information for sustainable tree fruit production in Washington and the world.

Recent News

Learn why the Douglas County Voluntary Stewardship Program Helps You Avoid Additional Regulations

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The Voluntary Stewardship Program (VSP) provides a non-regulatory, incentive-based method of critical area protection on lands that intersect agricultural activities. VSP is an alternative to…


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The FDA has released draft guidance for farms which must comply with the Produce Safety Rule (Standards for the Growing, Harvesting, Packing and Holding of…

Are you spraying enough? Preliminary results from WSU-Prosser IAREC.

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Industry standards to apply fungicides might not be enough for Powdery mildew control in sweet cherry.

Pesticide look-up tool for bee protection

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Want to make pesticide choices that help protect the bees in your orchard? There is a web-based decision tool to help you developed by the UC…

Early Season Root Management to Reduce Calcium Deficiency Disorders in Tree Fruit

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A team of Washington State University researchers, led by Bernardita Sallato, have recently initiated a 3-year project funded by WSDA on root growth management to…

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Featured Event

2019 Apple Hort. & Postharvest Research Review

Jan 23, 2019
The 2019 Apple Horticulture and Postharavest Research Review will be held at the Confluence Technology Center in Wenatchee, January 23-24, 2019. An agenda will be available approximately 2 weeks prior to the meeting. For more information…

Upcoming Events


2019 Apple Hort. & Postharvest Research Review

Confluence Technology Center
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Hollyday in tacoma mall
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Okanogan Horticultural Society Meeting

Okanogan County Agriplex
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2018 Impact Report: Tree Fruit Endowment Advisory Committee (pdf)

Featured Videos

Northwest Profiles: Cosmic Crisp® (New Washington State Apple)

Bred from the marriage of two apples, and over 20years in the making…a once in a generation pome is destined to make a huge splash in the apple industry. Dubbed the Cosmic Crisp®, this apple…

The Soil is Alive

A diverse abundant soil food web cycles water and nutrients, suppresses plant pathogens and helps buffer plant stress. Feed the soil food web to improve plant health. Animated video by Tianna DuPont, WSU Extension and…

Mike Willett talks about CM

Mike Willett talks about how pests threaten our crops, like Washington’s iconic apples. See how Washington’s apple growers are using integrated pest management to reduce pesticide use in our apple orchards.

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Recent Publications

Protective Netting Improves Leaf-level Photosynthetic Light Use Efficiency in ‘Honeycrisp’ Apple Under Heat Stress

G Mupambi, S Musacchi, S Serra, L Kalcsits, D Layne, and T Schmidt. 2018. HortScience 53(10): 1416-1422. DOI: 10.21273/HORTSCI13096-18

Recent Trends in Certified Organic Tree Fruit in Washington State: 2017

The following slide set presents the current data on organic tree fruit area and production for Washington State, with some associated global and national data. Data come from various sources including certifiers, the World of…

Anthracnose Canker Management Plan for Commercial Apple Orchards in Western Washington

Information for managing anthracnose canker, a major disease limiting apple production in western Washington, western British Columbia, and the Columbia Gorge.

Superficial Scald Risk Assessment Assay for Apples

Step-by-step guide to an assay to quantify risk of superficial scald development. This assay could have benefits for organic fruit—where scald-mitigating treatments and limited—and for conventional fruit where the effectiveness of scald-mitigating treatments can be…

New WPS Respiratory Protection Guide

The Pesticide Education Research Collaborative is happy to announce a new resource, “Worker Protection Standard (WPS) Respiratory Protection Guide: Requirements for Employers of Pesticide Handlers”, a 45-page guide to help employers of pesticide handlers meet…

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