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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.

Fruit Matters July 2024 screenshot

Fruit Matters – Tree Fruit News July 2024

In this issue of Fruit Matters, hiring a Tree Fruit Extension Educator, heat stress information, apply for USDA funding, summer events, and more.

Recent News

Grounding Long-Term Soil Health Tree Fruit Research in Stakeholder Needs

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From soil health issues to fruit quality concerns, growers face obstacles that demand innovative solutions….

HIRING: WSU Tree Fruit Extension Educator

HIRING: WSU Tree Fruit Extension Educator

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We are currently seeking a dynamic individual for a WSU Tree Fruit Extension Educator – Information and Technology Transfer position.

WSU Decision Aid System Update July 2024

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The DAS apple sunburn model

Apply for USDA Funding for Food Safety Certifications

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The USDA has expanded funding for specialty crop growers through the Food Safety Certification for Specialty Crops (FSCSC) program for 2024 and 2025, offering financial…

WSU Decision Aid System Update June 2024

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Use DAS to consider natural enemies when controlling pests

AWN Update

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The month of May saw the resumption of Mesonet station construction by the AgWeatherNet (AWN) Field Team and an expansion of our air quality network.…

Free earwigs and earwig training, Wenatchee, Yakima, Hood River, and Whatcom, 2024

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Come get a free bucket of earwigs for your farm. July workshops will cover methods to mass-collect this stone fruit pest and transport them to…

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Upcoming Events


CPAAS and Ag Weather Network Open House

WSU-Prosser Roza Orchard
Event Details


Pear Psylla Field Day 2024

McDevitt orchard in Peshastin, WA
Event Details


Irrigation Technology Field Day

Event Details


Smart Orchard Field Day

Smart Orchard Mattawa
Event Details


WSU-USDA Tree Fruit Research Field Day Sunrise Orchard

WSU Sunrise Orchard
Event Details

More Events


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Featured Videos

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Private Network Participation – the Hardware and Software

Presented by Field Meteorologist, Contezac Hill and Sean Hill, Applications Systems Analyst/Developer
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WSU Weather School: Soil Moisture Sensors

A presentation by R. Troy Peters, PHD, PE, Professor/Extension Irrigation Engineer, WSU Prosser
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AgWeatherNet Web Portal

AWN portal use presentation by Sean Hill, Application Systems Analyst, WSU AgWeatherNet
Ag Weather Net video title page screenshot, Technical Update on Washington's' Weather Network

Technical Update for AWN

A presentation by Jonathan Contezac, Field Meteorologist at AWN Mount Vernon
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AWN Overview

An overview of the WSU AgWeatherNet. AWN collects and delivers high quality, site-specific weather data and products for effective agricultural decision-support, serving irrigated agriculture in central Washington and the rest of the state (farmers, gardeners,…

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Recent Publications

figure showing releative efficacy of non antibiotic materials.

Evaluation of biopesticides for the control of Erwinia amylovora in Apple and Pear

In a recent study, we evaluated non-antibiotic materials for fire blight control in 8 Washington, 3 Oregon, 3 New York and 2 Pennsylvania field experiments conducted between 2013 to 2022.

Investigations of Multiple Approaches to Reduce Green Spot Incidence in ‘WA 38’ Apple

A pre-harvest apple (Malus × domestica Borkh.) disorder named “green spot” (GS) was recently identified on ‘WA 38’ apples. Previous work indicated a tentative association between GS and fruit mineral imbalance, and an influence of…

Soil Health Indicators for Central Washington Orchards

To help growers in Central Washington orchards, Washington State University scientists demonstrated that all soil health indicators should include measurements of water availability and root health in addition to standard fertility indicators to meet stakeholder…
image shows a tractor pulling a rototiller attachment making individual tilled rows.

Field scale application of Brassica seed meal and anaerobic soil disinfestation for the control of apple replant disease.

Study published June 2021 in Applied Soil Ecology shows potential of anaerobic soil disinfestation and biorenovation with mustard meals for mitigation of replant disease.

Towards rapid detection and mapping of powdery mildew in apple orchards

Chandel, Khot, Sallato Dec 2020. Powdery mildew (PM) in apples is a critical fungal disease that adversely affects yield and fruit quality. Conventional PM identification techniques are laborious. This study evaluated the suitability of non-destructive…

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