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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

North Central Washington Tree Fruit Days

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Join us for WSU Tree Fruit Extension Programs in North Central Washington. NCW Tree Fruit Days January 16, 2024 – January 18, 2024   Agendas are now…

The International Fruit Tree Association (IFTA) Conference and Tours

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Registration opens December 1st for the 67th Annual IFTA Conference and Tours February 11-14, 2024 Yakima, Washington Two full days of speakers/presentations A full day…

Year 2 of pheno-IPM for pear psylla management: it worked, 2023

Year 2 of pheno-IPM for pear psylla management: it worked, 2023

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In their second year following IPM guidelines, pear orchards on this research project had less honeydew damage and more beneficials than comparison conventional orchards.

Community Survey – Japanese Beetle

Community Survey – Japanese Beetle

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We need your feedback! The Washington State Department of Agriculture (WSDA) would like your feedback on our Japanese beetle eradication project. Please take a few…

Grower Input Needed for Environmental Impact Study of Washington’s Apple Production

Grower Input Needed for Environmental Impact Study of Washington’s Apple Production

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Written by Dan Langager, Northwest Horticultural Council, November 1, 2023   As demand for agriculture to reduce its climate impacts continues to build from regulators,…

New WSU Produce Safety Scientist

New WSU Produce Safety Scientist

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A new produce safety scientist joined WSU’s Irrigated Agriculture Research and Extension Center in Prosser

Fall and Spring Fumigation to Avoid Replant Disease

Fall and Spring Fumigation to Avoid Replant Disease

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Pre-plant soil preparation is essential to avoid replant problems.

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Upcoming Events

4
Dec

Webinar: Advances in Biological Control for Management of Spotted-Wing Drosophila

Online webinar
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

17
Jan

Stone Fruit Day – North Central Washington Tree Fruit Days

Wenatchee Convention Center
Event Details

More Events

Featured Videos

thumbnail of Codling Moth Bin Management video

Codling Moth: Bin Management

For decades, we have known that wooden bins are a site where codling moth can overwinter. Therefore bin management must consider the effect on IPM. Industry expert Brad Higbee shares his research and experience to…

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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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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