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

Current Cherry Bud Hardiness

Published on
With night-time lows in the 20s next week a few growers are asking about cherry bud hardiness at this time of the year. Dr David…

Fall kaolin sprays suppress psylla next year

Published on
Using Surround (kaolin) is a very effective method for repelling pear psylla. This white clay powder covers the bark of trees, preventing psylla from laying…

Cross-compatibility of apple cultivars and pollinizers

Published on
The successful fertilization of floral egg cells by compatible pollen (sourced from a different parent tree) gives rise to seeds, and it is the fertilization…

Stakeholder Listening Session October 17 – North Central

Published on
A tree fruit stakeholder listening session was facilitated October 17, 2019 in North Central Washington. The objective of this session was to provide an additional…

2019 Apple Pesticide Residue Report Now Available

Published on
Since 2011, the WTFRC has conducted studies in apple and cherry to generate pesticide residue data for commonly used insecticides and fungicides to help Washington…

More News

Featured Event

Produce Safety Alliance Grower Training – Yakima

Nov 8, 2019
The Washington State Tree Fruit Association will hold two (2) Produce Safety Alliance Grower Training courses on October 25th, 2019 in Wenatchee, WA and November 8th, 2019 in Yakima, WA. This one-day class fulfills the FSMA…

Upcoming Events


Produce Safety Alliance Grower Training – Yakima

Yakima Convention Center
Event Details


2020 NW Cherry Research Review

Confluence Technology Center
Event Details


Next Generation Network: New Technology for Efficient Harvest

Chateau Faire Le Pont
Event Details


Next Generation Network: Looking Ahead at Market & Economic Trends

Chateau Faire Le Pont
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

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

Postharvest Dry Matter and Soluble Solids Content Prediction in d’Anjou and Bartlett Pear Using Near-infrared Spectroscopy

A. Goke, S. Serra, S. Musacchi. 2018. Hortscience 53(5):669-680.

More Publications

Get Connected

Washington State University