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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

The First Year of the Pear Psylla Phenology-based Management Program Exhibits IPM Success

Published on
2022 was the first year of comparing WSU’s pear psylla IPM phenology program against conventional programs in commercial pear orchards. Compared with conventional orchards, IPM…

Updates on Evaluating Replant Strategies for X-disease Infected Orchards

Updates on Evaluating Replant Strategies for X-disease Infected Orchards

Published on
OSU and WSU Faculty and Extension are evaluating removal and replant strategies for X-disease infected orchards.

Apple Orchard Microclimates

Apple Orchard Microclimates

Published on
Find out how much weather conditions in your apple orchard differ from nearby open-field weather stations and what that means for orchard management.

NCW Tree Fruit Days January 17-19 in Wenatchee January 21 in Chelan, and February 7 in Omak

Published on
Join us for North Central Washington Tree Fruit Days on January 17-19, 21 and February 7. Co-sponsored by WSU Extension, Northwest Cherries, Pear Bureau Northwest,…

Taking Soil Health Principles to Practice: SoilCon 2023

Published on
The Washington State Soil Health Initiative (WaSHI) announces SoilCon 2023 held on February 14th & 15th 2023.

Apple Rootstock Vigour and Production: Effects of Rootstock on ‘Honeycrisp’

Published on
This document presents the performance of Honeycrisp on 16 rootstocks in the 9th year of the trial, including 3 industrial standard Malling rootstocks, 4 Budagovsky…

Ag Weathernet Station-Specific 10-day Weather Forecasting Model for Improved Grower Decision Support

Ag Weathernet Station-Specific 10-day Weather Forecasting Model for Improved Grower Decision Support

Published on
Agweathernet is developing station specific 10-day weather forecasts which help improve forecast accuracy.

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Upcoming Events

12
Dec

Fire Blight Webinar Series: Models for prediction

Virtual
Event Details

14
Dec

Pear IPM Intensive

Confluence Technology Center
Event Details

16
Jan

NCW Tree Fruit Days

Wenatchee Convention Center
Event Details

17
Jan

Apple Day – North Central Washington Tree Fruit Days

Wenatchee Convention Center
Event Details

17
Jan

Manejo de Frutales

Wenatchee Convention Center
Event Details

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Featured Videos

Cómo verificar si hay daños en la yema de la manzana en el árbol

¿Busca daños en los brotes de manzana? Observe cómo Bernardita Sallato, de la Universidad Estatal de Washington, muestra cómo cortar y evaluar rápidamente los capullos de manzana en el árbol e identificar los daños en…

Smart Orchard Field Day: Smart Apply/RDO Demonstration

In this video, we will learn what smart guided systems to spray. How it works, and how to calculate the application rates. We will also see a demo of spraying in a commercial apple orchard.

Smart Orchard Field Day: G.U.S.S. Demonstration

In this video we will learn what is GUSS technology and how it works. We will also see a demo spraying in a commercial apple orchard.

WSU Weather School Video

Meteorologic Basics by Jon Boomgard-Zagrodnik

Consumer Preferences for Pears

Carolyn Ross, Ann Colonna, and Karina Gallardo will discuss extensive research conducted last winter with over 20 pear varieties aimed at understanding which characteristics consumers in the Pacific Northwest prefer.

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Recent Publications

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…

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…

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