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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

The Die-Off of Generic Escherichia coli on Preharvest Apples

Published on
Key Findings and Recommendations on Time-to-Harvest Intervals for Washington Apple Growers from Two Recent Studies.

Real-Time Detection of Little Cherry Disease: Research Progress and Findings

Published on
Little Cherry Disease (LCD), caused by three pathogens – Little Cherry Virus-1 (LChV-1), Little Cherry Virus-s (LChV-2), and X-disease phytoplasma (XDP) – poses a serious…

Upcoming Produce Safety Alliance Grower Trainings

Published on
The WSDA Produce Safety Program, Washington State University, and the Washington State Tree Fruit Association, are organizing multiple upcoming in-person Produce Safety Alliance Grower Trainings…

Big data comes for the big apple: WSU researchers develop interactive tool for visualizing food consumption

Published on
An apple a day keeps the doctor away, the saying goes, but how much do Americans eat apples?

Frost Protection Tools, Upcoming Cold Hardiness Webinar, and Team Additions

Published on
AgWeatherNet is back with its Weather with AgWeatherNet monthly webinar series! In October, we featured our new forecasting platform for frost protection. Join us this…

Pear psylla damage comparable in conventional and IPM orchards across the first three years using IPM

Published on
Wenatchee Valley pear orchards in their third year of following IPM guidelines experienced similar pear psylla damage as conventional orchards in 2024.

STAR Conservation Survey

Published on
Help us by sharing your insights! We are surveying experts and practitioners (i.e., farmers, researchers, agronomists, etc.) to learn more about the tree fruit conservation…

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Upcoming Events

7
Jan

Understanding the Cherry Cold Hardiness Model

Virtual
Event Details

21
Jan

Pear Day – North Central Washington Tree Fruit Days – 2025

Wenatchee Convention Center
Event Details

22
Jan

Stone Fruit Day – North Central Washington Tree Fruit Days

Wenatchee Convention Center
Event Details

23
Jan

Apple Day – North Central Washington Tree Fruit Days 2025

Wenatchee Convention Center
Event Details

23
Jan

Spanish Session (Manejo de Frutales) 2025

Wenatchee Convention Center
Event Details

More Events


 

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Featured Videos

Forecasting Station Specific Weather

This presentation is an example of how good quality, local weather data can be used in abiotic stress models for both present and forecasted weather.

Weather Sensing: Adding Private Stations to AWN

AgWeatherNet hosts numerous public weather stations. But reaching every farm and location is challenging. Therefore, many growers have opted for private weather stations. Watch the experts at AWN give expert advice on the proper hardware…

Lacewing and Aphid Scouting

An instructional video describing methods for scouting for aphids and lacewings in apple orchards. This video was produced by Tianna DuPont, WSU Extension and Rebecca Schmidt-Jeffris, USDA-ARS as part of SARE Project SW24-004: Developing best…
video cover shot

Private Network Participation – the Hardware and Software

Presented by Field Meteorologist, Contezac Hill and Sean Hill, Applications Systems Analyst/Developer
Screenshot Soil Moisture Sensors

WSU Weather School: Soil Moisture Sensors

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

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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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