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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

Spring considerations to prevent Bacterial canker disease in sweet cherries

Published on
A reminder about best management practices to reduce the risk of bacterial canker outbreaks this spring.

How will changes in almond pollination effect tree fruit?

How will changes in almond pollination effect tree fruit?

Published on
Uncertainty in beekeeping and challenges in the almond industry are likely to impact tree fruit growers in Washington. Maintain and build good relationships with your…

AWN Update

AWN Update

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AWN has spent most of the winter focusing on revamping our web portal and planning for new, monthly outreach events called Weather With AWN.

WTRFC Project Synopsis: Efficient heat stress management for improved apple fruit quality

WTRFC Project Synopsis: Efficient heat stress management for improved apple fruit quality

Published on
This article reports the findings from the Washington Tree Fruit Research Commission funded project titled “Efficient heat stress management for improved apple fruit quality” (2021-2023).

NOSB Spring Comment Period Underway on Approved Materials in Organics

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The NOSB will hold its annual spring meeting April 29-May 1, 2024 with public comment webinars the week prior.

WSU Decision Aid System Update March 2024

WSU Decision Aid System Update March 2024

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Welcome to DAS 2024 updates

Apple Grower Participation Needed for LCA Survey

Published on
Complete the orchard data survey to ensure the success of the project for the entire Pacific Northwest apple industry.

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Upcoming Events

28
Mar

Weather with AgWeatherNet: Tier 3 Program

Online
Event Details

14
Jun

WA 64 Spring Field Tour

WSU-Prosser Roza Orchard
Event Details

21
Jun

WA 64 Spring Field Tour

WSU-Prosser Roza Orchard
Event Details

26
Jul

Smart Orchard Field Tour

Smart Orchard Mattawa
Event Details

17
Sep

WA 64 Pre-Harvest Field Tour

WSU-Prosser Roza Orchard
Event Details

More Events

Featured Videos

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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,…

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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Meteorology Basics

A 25-minute crash course/Weather 101 answering basic questions about how weather works in the atmosphere.

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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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