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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. Learn more about tree fruit research and extension at WSU.

Recent News

Full Bloom Dates for Red Delicious Apples

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The date of full bloom at the WSU Tree Fruit Research and Extension Center is used as a relative comparison of one year to another. The…

How to Effectively Manage Codling Moth

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Without any intervention, codling moth numbers increase about four-fold from generation to generation. Therefore, targeting the first generation is important to reset the population size…

The Deposition Triangle

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Now is the time to prepare your sprayers for the spring. The greatest return on your investment is to 1) change your pressure gauge, 2)…

Robot Ready Canopies

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With labor at harvest a major challenge to the global tree fruit industry, robotic harvesters are close to hitting the orchard. Dan Steere, Abundant Robotics;…

Fire Blight – Remember last year’s infections are this year’s innocula

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With the large number of fire blight infections last year it is important to be on top of our management this year and assume fire…

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Featured Event

Tri Cities Fruit Club

The Tri Cities Fruit Club meets monthly for discussion and networking. The topic this month will be Fire Blight prevention with Tianna DuPont, WSU Extension.

Upcoming Events


Tri Cities Fruit Club

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Drone Data Analytics in Agriculture Workshop-2

Ag Tech Building
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Pear IPM Discussion: Bugs & Brews

Mission Creek Community Club
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2017 Impact Report: Tree Fruit Endowment Advisory Committee (pdf)

Featured Videos

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.

Life on a Leaf

Description of mites that can be found on apple leaves. Video taken with a dissecting microscope 10x-70x.

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Latest Newsletter

Newsletter Archive

Recent Publications

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…

WA 38 Characteristics & Horticulture Factsheet

Here we will cover growth habit, establishment considerations, training systems, pruning techniques, crop load management, fruit type and fruit quality.

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