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
Climate Smart Farm Equipment Grant Opens September 4, 2026
The new climate smart farm equipment grant program helps farmers purchase equipment that reduces agricultural greenhouse gas emissions while improving soil health, air and water…
WSU Decision Aid System Update August 2026
Codling Moth Sources: As apple harvest and storage approaches, it is important to discuss the role of bin piles as a source of codling moth…
Focus Group: Changes in Pesticide Use in Apples
Washington State University Extension, with help from the Washington State Department of Agriculture, would like your help in researching changes in pesticide use in apples…
Industry-Funded Carbon Analysis Tool Now Available to Apple Growers and Packers
The Pacific Northwest apple industry is taking charge of its environmental data. The carbon footprint tool is now available through the Washington Tree Fruit Research…
The Next Cherry Crop Starts at Harvest
Maintaining healthy leaves, mitigating heat and vigor, and replenishing reserves after harvest can improve next year’s crop consistency.
WSU-USDA Sunrise Research Farm Field Day
Please join us at the 2026 WSU-USDA Sunrise Research Farm Field Day on September 23rd from 2 – 5 pm to learn the latest tree…
Upcoming Events
Get Connected
Featured Videos
Assessing your Lacewing Shipment
WSARE Project SW24-004 “Developing best practices for releasing lacewings in apples.” Led by Rebecca Schmidt-Jeffris, USDA, Tianna DuPont, WSU
Monitoreo y muestreo para la enfermedad de la cereza pequeña
Fire Blight of Apple and Pear
This animation illustrates the biology of fire blight infections in apple and pear. Video produced by Tianna DuPont, Washington State University. Animation by Dani Abram. Funded by USDA SCRI grant #2020-51181-32158. Thank you to reviewers…
New codling moth tools- NCW Tree Fruit Days 2025
Betsy Beers, WSU Entomology described efficacy information on new codling moth products at North Central Washington Apple Day. Part of North Central Washington Tree Fruit Days sponsored by WSU Extension, NW Cherry Growers, Pear Bureau…
Optimizing tree fruit nutrition for fruit quality
Bernardita Sallato described the basics of nutrient demand and their impact on fruit quality, tools to determine rate, and a review of monitoring strategies at NCW Stone Fruit Day 2025. Part of North Central Washington…
Recent Publications
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…
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…
