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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 Utility of Bitter Pit Prediction Models for Honeycrisp in Washington State

Published on
Written by Ines Hanrahan and Marcella Galeni, Washington Tree Fruit Research Commission, June 2019.        At a Glance: Methods evaluated: Ethephon method; Passive method;…

Cherry Insect Control during Harvest

Published on
June 7, 2019, WSDA PMD (TWS)   The 2019 cherry harvest has begun. During this time, it may be necessary to apply insecticides to manage…

Managing earwigs: how and why to conserve in pome fruits and suppress in stone fruits

Published on
Earwigs are omnivores capable of damaging fruits, but they can also suppress pests such as woolly apple aphid and pear psylla. So, are earwigs pests…

Tips to minimize apple and pear fruit infections in atypical cool and wet early season

Published on
Written by Achour Amiri, WSU, May 2019   The unusual cool and wet spring observed, so far this season in Central Washington, has to be…

Fire blight susceptibility of apple cultivars

Published on
New research documents the relative susceptibility to fire blight of a broad range of apple cultivars.

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Featured Event

Insect ID, Scouting and Management

Aug 1, 2019
Join the Next Generation Tree Fruit Network and the Pear IPM Team to learn techniques in pest and natural enemy scouting, identification, and management in apples and pears. This event will feature field and laboratory…

Upcoming Events


Insect ID, Scouting and Management

WSU-Tree Fruit Research and Extension
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Pear Tour and MCAREC Field Day

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Next Generation Network: Fruit Beeding 101

WSU Columbia View Orchard
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Next Generation Network: New Technology for Efficient Harvest

Chateau Faire Le Pont
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Featured Videos

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…

Northwest Profiles: Cosmic Crisp® (New Washington State Apple)

Bred from the marriage of two apples, and over 20years in the making…a once in a generation pome is destined to make a huge splash in the apple industry. Dubbed the Cosmic Crisp®, this apple…

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Recent Publications

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.

Characterization of a novel self-incompatibility allele in Malus and S– genotyping of select crabapple cultivars

R. Sheick, S. Serra, P. De Franceschi, L. Dondini, S. Musacchi. 2018. Scientia Horticulturae 240:186-195.

Optimization of Leaf Area Estimation in a High-Density Apple Orchard Using Hemispherical Photography

A. Knerl, B. Anthony, S. Serra, S. Musacchi. 2018. HortScience 53(6):799-804.

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