WSU Tree Fruit | Washington State University Skip to main content Skip to navigation

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

Welcome Dr. Bolivar-Medina

Published on
Dr. Jenny Bolivar-Medina recently joined WSU as a Tree Fruit Extension Information Technology Transfer Specialist (ITT). As an integral member of the Tree Fruit Extension…

NCW Tree Fruit Days January 20, 27-29 in Wenatchee and Chelan, and February 11 in Omak

Published on
Join us for WSU Tree Fruit Extension Programs in North Central Washington on January 20, 27, 28, 29, February 11, 2020. Co-sponsored by Northwest Cherries,…

Pre and Postharvest Disease Management Workshop

Published on
Join us to learn about best management practices to fight pre and postharvest pathogens which cause rots and continue to challenge the pome fruit industry.…

Seeking comments for EPA re: use of paraquat

Published on
The EPA is currently conducting a registration review of paraquat dichloride, and has released draft human health and ecological risk assessments, which can be found…

What Specialty Crops Might Thrive in the Northwest in the Future?

Published on
Specialty crop production, like virtually all agricultural systems across the region, will be challenged by climate change. Over the coming decades, the Northwest is projected…

More News

Featured Event

WSTFA 115th Annual Meeting and NW Hort Expo

Dec 9, 2019
The Washington State Tree Fruit Association (WSTFA) will host the 115th Annual Meeting and NW Hort Expo at the Wenatchee Convention Center in Wenatchee WA on December 9th, 10th, & 11th 2019.  The Annual Meeting will…

Upcoming Events


WSTFA 115th Annual Meeting and NW Hort Expo

Wenatchee Convention Center
Event Details


CORE in the Gorge – Hood River, OR

Columbia Gorge Community College
Event Details


CORE in the Gorge – The Dalles, OR

Columbia Gorge Community College
Event Details


WPS Train-the-Trainer Refresher Course

Coast Wenatchee Center Hotel
Event Details

More Events

Featured Videos

Taking time when testing WA 38 (COSMIC CRISP®) maturity

Ines Hanrahan, executive director of the Washington Tree Fruit Research Commission, shows differences in testing apple maturity between Granny Smith and WA 38 (COSMIC CRISP®) using an iodine starch test. Learn more about the recently…

Para mejorar la calidad de fruta, utilice el análisis de suelo

El análisis de suelo es fundamental para el manejo de la nutrición del huerto. En este video, Bernardita Sallato nos muestra cómo tomar la muestra de suelo en un huerto frutal.

Netting for Apple Insect Management

Shade nets are becoming popular to reduce sunburn on apples, but what effect do they have on movement of insects? WSU graduate student Adrian Marshall is investigating the potential of mesh barriers to keep pests…

WA 38 Fruit Quality Update 2019

Dr. Ines Hanrahan, Executive Director for the WA Tree Fruit Research Commission, presents information about WA 38 fruit quality studies including recent results and future plans. This presentation was part of the 2019 Apple Day…

WA 38 Horticulture Update 2019

Dr. Stefano Musacchi, Endowed Chair of Tree Fruit Physiology & Management at WSU, discusses the most recent information about the best horticultural practices for WA 38 apple trees and updates on related research. There is…

More Videos

Recent Publications

The Modern Apple Orchard: What does it entail?

Modern tree fruit orchards are planted with a goal of maximizing efficiency and productivity. Mechanized operations are ideal for high-value, large operations to increase profitability. Consequently, there has been a steady increase in sparsely-branched thin…

Responses of ‘Honeycrisp’ Apples to Short-term Controlled Atmosphere Storage Established During Temperature Conditioning

‘Honeycrisp’ apples are susceptible to bitter pit, a physiological disorder that impacts peel and adjacent cortex tissue. ‘Honeycrisp’ is also susceptible to chilling injury (CI) that can be prevented by holding fruit at 10 to 20 8C…
4th leaf WA38 regraft with full 2-d canopy and full crop.

Apple Scion and Rootstock Contribute to Nutrient Uptake and Partitioning under Different Belowground Environments

Soil environment strongly contributes to tree growth and development, affecting nutrient and water uptake. Composite woody perennials, like apple, are a combination of two genetically different parts: a rootstock and a scion, and yet, the…

Use of Protective Netting in Washington State Apple Production

G Mupambi, D Layne, L Kalcsits, S Musacchi, S Serra, T Schmidt, and I Hanrahan. 2019. TB60E. WSU Extension Pubs. Washington State (WA) is the largest producer of apples in the United States. The major…

Protective Netting Improves Leaf-level Photosynthetic Light Use Efficiency in ‘Honeycrisp’ Apple Under Heat Stress

G Mupambi, S Musacchi, S Serra, L Kalcsits, D Layne, and T Schmidt. 2018. HortScience 53(10): 1416-1422. DOI: 10.21273/HORTSCI13096-18

More Publications

Get Connected

Washington State University