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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

Cost Share Funds Available to Cherry and Stone Fruit Producers through Grant for X-disease and Little Cherry Disease Tree Removal

Published on
Washington State University Extension in partnership with county Conservation Districts and Pest Boards announce the availability of cost-share funds for the removal and testing of…

Early Fall Defoliation in Sweet Cherry

Early Fall Defoliation in Sweet Cherry

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In perennial species, natural leaf senescence in the fall is part of a remobilization of mobile nutrients and carbohydrates to wood, buds and roots.

Reimbursement for Composting

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WSDA is launching the Compost Reimbursement Program to encourage on-farm compost use. Approximately $1 million will be distributed annually on a first-come, first-served basis. All…

BMPs for tree removal for X disease and Little Cherry Virus infected trees

BMPs for tree removal for X disease and Little Cherry Virus infected trees

Published on
Methods to remove trees infected with X-disease or Little cherry disease.

Recommended Harvest Criteria for Commercial WA-38 Storage in 2023

Published on
Use this guide in addition to the published marketing and quality standards for the 2023 crop year. First ship date for fruit produced in the…

AgWeatherNet Update

AgWeatherNet Update

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The month of August saw the completion of two new Mesonet tower stations bringing the network total to 40. It was also a busy month…

Fall Leafhopper Management

Fall Leafhopper Management

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Manage leafhopper vectors of X-disease in their final fall generation.

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Upcoming Events

18
Oct

Fire Blight Webinar: Optimizing Biologicals and Biopesticides

Event Details

15
Nov

Pear Study Circle – Scouting, Thresholds, Conserving Natural Enemies

Mission Creek Community Club
Event Details

13
Dec

Pear Study Circle – Phenology Based IPM

Mission Creek Community Club
Event Details

16
Jan

NCW Tree Fruit Days

Wenatchee Convention Center
Event Details

16
Jan

Pear Day – North Central Washington Tree Fruit Days

Wenatchee Convention Center
Event Details

More Events

Featured Videos

Pre-emergent Herbicides-Timing Trials and Product

Mike discussed results from his multi-year pre-emergent herbicide timing trials at two field sites in New York. He provided some practical tips for fall herbicide applications to maximize product efficacy, and will briefly review some…
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Codling Moth: Achieving Optimum Spray Coverage

Sprayer calibration and optimization per canopy architecture is achievable if it is prioritized by management and personnel have an understanding of the affect of air, nozzles, and rates on deposition. Extension Specialist, Gwen Hoheisel, provides…
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Codling Moth: Considerations When Building a Spray Program

Chemical choices are clear, but the challenge is how to build a spray program that incorporates “The Decision Triad”, resistance management, and takes advantage of the selectiveness (ovicides, larvicides) of new chemistries. WSU researcher Rob…
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Codling Moth: Resistance Management

Historically, the availability of different chemical choices has been driven by regulations and pesticide resistance. Understanding how the over use of chemical classes leads to the loss of products should be the foundation of a…
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Codling Moth: The Effects of Netting

Netting is commonly used for sun and wind protection, but it can also be used to exclude insects from an orchard. Adrian Marshall shares research and expertise on how to implement netting for IPM.

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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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