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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

New Orchard Tour Videos Posted

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Convened by Dr. Stefano Musacchi, WSU hosted the International Society for Horticultural Science (ISHS) XII Orchard Systems Symposium in July 2021. The symposium was virtual…

WSU releases roadmap for Soil Health Initiative

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A 124-page “roadmap” that outlines current challenges and pathways to help maintain healthy soils as an agricultural and environmental resource has been released.

Provide Feedback on Skin Cancer Prevention

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Are you an outdoor worker? The University of Washington is doing a study on skin cancer prevention, we would like to learn about your experiences…

Pear Productivity Study Circle Highlights

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At a recent WSU Extension study circle pear producers discussed tactics to improve productivity. Here we summarize highlights from the conversation.

Días de campo para el manejo del vector de la enfermedad fitoplasma-X

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Resumen de los puntos más importantes del día de campo

X-Disease Phytoplasma Vector Management Field Days

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Summary of the main learning points discussed in the LCD field days

2021 Apple Pesticide Residue Study Report

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A summary report, the detailed report for the 2021 study, and previous reports from similar projects on apple and cherry are presented on the WTFRC…

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2021 Codling Moth Survey
Codling moth has been the key pest of pome fruits across the growing regions of Washington and Oregon for over a hundred years. Over that time, pest management programs regularly evolved as key pesticides were phased…

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Upcoming Events


Irrigation for Fruit Quality – Pear Horticulture Study Circle

Mission Creek Community Club
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2022 Technology Research Review – Virtual

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Using pear psylla phenology to better time applications – Pear IPM Study Circle

Mission Creek Community Club
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Assembling an IPM programs that work – Pear IPM Study Circle

Mission Creek Community Club
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NCW Tree Fruit Days

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Featured Videos

Soil Health in Orchards

Tianna DuPont, WSU Extension shares the results of recent work surveying soil health in Central Washington Orchards.

How Soil Health Management Practices Affect Plant Parasitic Nematodes and Root Health

Tom Forge, AgriFood Canada describes the impacts of plant parasitic nematodes on root health and potential management strategies.

Soil Organic Matter Demonstration

A video demonstration of two ways to measure active carbon in orchard soils: permanganate oxidizable carbon and particulate organic matter. Authors Tianna DuPont, Andy McGuire, David Granatstein, WSU Extension.

Soil Available Water Capacity Demonstration

The available water capacity of soil is the amount of water that is held in the soil which is available for plants. This video contains a short illustration of available water from orchard soils. Authors…

Root Health Rating Demonstration

This video shows two methods researchers use to compare soil borne disease pressure on plant roots.

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Recent Publications

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…

Photoselective Protective Netting Improves “Honeycrisp” Fruit Quality

Sara Serra et al. Dec 2020. High temperatures, wind, and excessive sunlight can negatively impact yield and fruit quality in semi-arid apple production regions. Netting was originally designed for hail protection, but it can modify…

Sweet Cherries

L. Long, G. Lang & C. Kaiser Dec 2020. This new book provides comprehensive coverage of the history, genetic improvements, production physiology of growth and cropping, orchard establishment and management, and harvest considerations for sustainable…

Recent Achievements and New Research Opportunities for Optimizing Macronutrient Availability, Acquisition, and Distribution for Perennial Fruit Crops

Lee Kalcsits et al. 10/2020. Here, we highlight recent advancements and identify knowledge gaps in nutrient dynamics across the soil–rhizosphere–tree continuum for fruit crops.

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