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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

Cherry Powdery Mildew – Questions and Answers from 2017

Published on
 by Gary Grove, WSU Plant Pathology; Tianna DuPont, WSU Extension Why was Cherry Powdery Mildew so bad in 2017? May and June in Washington were…

WA 38 / Cosmic Crisp ® Pruning Demonstrations Scheduled Dec 13 and 14

Published on
Dr. Stefano Musacchi will conduct pruning demonstrations at both the WSU Sunrise block in Rock Island and the WSU Roza block in Prosser. WSU Sunrise…

Next Generation Tree Fruit Network Event: Labor and H2A

Published on
Dan Fazio WAFLA will share costs, logistics, paperwork and to do lists for H2A. Followed by round table discussion, networking and dinner.

Join WSU Extension for 2018 Winter Tree Fruit Programing in Central Washington

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Tree fruit producers and industry professionals are invited to WSU Tree Fruit Extension Programs in Central Washington on January 12, 15, 16, 17, 18, and…

Organic Certification Videos

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The WSDA Organic Program is pleased to share videos about organic standards and the certification process.

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Featured Event

Next Generation Network

Topic: Labor and H2A. download flyer Speakers: Dan Fazio WAFLA will share costs, logistics, paperwork and to do lists for H2A. Format: Speaker presentation will be followed by facilitated discussion, networking and dinner. Registration Click…

Upcoming Events


Next Generation Network

Frenchman Hills Barn
Event Details


Cosmic CrispTM Pruning Demos – WSU SRO & Roza

Event Details


Next Generation Network

The Old Flour Mill
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2017 Impact Report: Tree Fruit Endowment Advisory Committee (pdf)

Featured Videos

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.

How to Postharvest: PNW Dark Sweet Cherry Development Chart Index

Tutorial video on how to use the new Pacific NorthWest Dark Sweet Cherry Development Index Chart developed by Oregon State University. Spreadsheet is available for download below (“More” Section) or at:

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Latest Newsletter


Recent Publications

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.

Achieving sustainable cultivation of apples

Drawing on an international range of expertise, this collection focuses on ways of improving the cultivation of apples as a food crop at each step in the value chain, from breeding through to post-harvest storage….

WTFRC Apple Pesticide Residue Report

The WTFRC Internal Program recently completed their 2016 Pesticide Residue Study featuring 13 insecticide/acaricides and 7 fungicides commonly used in Washington apple orchards, including their first assessment of novaluron (Rimon) residues.

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