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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

Notice of Vacancy: Endowed Chair in Tree Fruit Soil and Rhizosphere Science

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Washington State University Department of Crop and Soil Sciences Notice of Vacancy WSU Position #121694   TITLE: ■          Endowed Chair in Tree Fruit Soil and…

Apple Sunburn 101

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Even though conditions have been relatively moderate most of this spring, the long, hot days of summer are coming. It is time for apple growers…

Deraeocoris bug – Know the Good Guys in your Pear Orchard

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The Deraeocoris bug (Deraeocoris brevis) or ‘derry’ is a common predator in Pacific Northwest orchards. The adult is active in spring long before most predators…

Sampling and Testing for Little Cherry Virus

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Directions for how to sample and mail little cherry virus samples for testing.

Pear Psylla – Summer Generations Overview and Management

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In most regions of Washington, the first generation of pear psylla nymphs have completed development, giving way to the first round of summerform adults. When…

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Featured Event

Columbia Basin Tree Fruit Club – field day

Jun 28, 2018
The June meeting will be a field day at the Roza research farm in Prosser.  We will have several stops, including:  Sweet Cherry Breeding program with Per McCord, WSU Stone Fruit Breeder  Discuss mildew research with…

Upcoming Events


Columbia Basin Tree Fruit Club – field day

WSU Prosser Roza Orchard
Event Details


Pear IPM Field Day

Parker Orchards
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Okanogan Horticultural Society Annual Tour

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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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