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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.

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Fruit Matters – Tree Fruit News April 2024

Weather and tech advances; new personnel; nutrient, pest, and crop management; surveys; grant awards and more in this issue.

Recent News

Watch for Fire Blight Risk

Published on
With warm conditions projected over the weekend fire blight risk may be marginal to high in areas with open bloom and rain or dew. Watch…

WA 64 Naming Contest

WA 64 Naming Contest

Published on
That the naming contest for WA 64 is now live! 

Temperature Inversion Forecasts Available for AgWeatherNet Mesonet Tower Stations

Temperature Inversion Forecasts Available for AgWeatherNet Mesonet Tower Stations

Published on
AgWeatherNet (AWN) has rolled out 24-hour temperature inversion forecasts for 21 Mesonet tower stations.

New entomology Endowed Chair excited about opportunity to help tree fruit industry

New entomology Endowed Chair excited about opportunity to help tree fruit industry

Published on
Tobin Northfield, WSU’s new Endowed Chair of Tree Fruit Entomology and Integrated Pest Management.

Introducing Dani Gray, IPM – ITT Extension Coordinator

Introducing Dani Gray, IPM – ITT Extension Coordinator

Published on
Welcoming the new IPM – ITT Extension Coordinator.

WSU Decision Aid System Update April 2024

WSU Decision Aid System Update April 2024

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DAS models begin as spring arrives!

AWN Update

AWN Update

Published on
This month, AgWeatherNet (AWN) is highlighting two new features on their website and inviting you to join the AWN Staff for their third Weather With…

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Upcoming Events


Food Microbiology 101 for the Fresh Produce Industry Training – April

WSU – IAREC, Prosser
Event Details


Episode 3 of Weather with AWN

Event Details


Columbia Basin Tree Fruit Club

Country Gentleman
Event Details


Día de campo: Importancia y manejo del riego en Frutales

WSU-Prosser Roza Orchard
Event Details


Pear Pest Management Discussion Group

La Tortuga Cashmere
Event Details

More Events


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Featured Videos

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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Managing Mites in Pears

Rebecca Schmidt Jeffris discussed spider mites, rust mites, and blister mites: how different active ingredients work, efficacy, pesticide effects on natural enemies, weed associations and pesticide impacts on outbreaks at NCW Tree Fruit Days. NCW…
microscopic view of powdery mildew

Powdery Mildew Best Management

Gary Grove, WSU Plant Pathology spoke at 2024 NCW Tree Fruit Days on powdery mildew management. Topics covered include: management starts with pruning; irrigation starts the infection cycle; importance of suckering; importance of timing products…
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Earwig Trapping, Releases and Pesticide Impacts

Aldo Hanel, WSU Entomology spoke at the 2024 NCW Tree Fruit Days on earwigs for biocontrol. Moving earwigs from stone fruit to pome fruit can improve control of woolly apple aphids and pear psylla, but…

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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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