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Fruit Matters Jun 7, 2021


Pear Psylla Phenology Update

Old nymphs (hardshells) from the first generation are still present but declining. Summerform adults and eggs are rapidly building in cooler locations (Cashmere) and nearing peak at 1500DD in warmer ones (Medford). Early instar nymphs…
cross pollination Granny Smith and WA38 graphic

Key points about floral biology, pollination and fruit set in WA38

Floral biology, pollination, pollinizer and fruit set information for WA38.
cartoon of cooling apples

Cooling Mechanisms for a Tree Fruit Orchard

Fruit nearing harvest when the background color starts to turn yellow is particularly susceptible to sunburn. Cooling systems need to start when air temperatures reach 85-90 °F. This article covers key cooling system characteristics.

Codling Moth Management Practices Survey Initial Results

Initial results from Codling Moth Task force industry survey show that 64% of respondents believe their codling moth damage has remained the same or decreased in the past three years.

Report Japanese beetles

Japanese beetle has been detected in the Grandview, Sunnyside area. WSDA is working to eradicate this invasive pest. You can help by reporting any Japanese beetles to WSDA and treating beetles (if found) to keep…
light brown insect with wings and large red eye laying eggs

Spotted Wing Drosophila

The latest management recommendations for spotted wing drosophila, an invasive pest from Asia. Updated June 2021.

IPM for spotted wing drosophila (SWD)

There is renewed interest nationwide in improving IPM for spotted wing drosophila (SWD).  This pest has been present in the continental US for over a decade, and a considerable amount of research has been done…
Figure 2 X-disease phytoplasma on Bing cherry.

Resources for Little Cherry & X-disease Scouting and Sampling 2022

Multiple resources are available for scouting and sampling of X-disease and Little Cherry disease during the 2022 season.

Understanding your X-disease, Little Cherry Disease Test Results

As you sample and test for X-disease and Little cherry disease here are a few things to keep in mind as you read your results.

2021 WTFRC Grant Awards for Apple Horticulture, Postharvest, and Crop Protection

In apple research, the Commission approved $745,796 to fund fifteen (15) new projects in the areas of apple horticulture, postharvest and crop protection.

2021 WTFRC Grant Awards for Technology

In 2021, the WA Tree Fruit Research Commission approved $1,396,455 to help fund twenty-seven (27) new projects in the areas of cherry, apple, and technology. In technology research, the Commission approved $459,029 to help fund…


Symptoms video

Symptoms of Little Cherry Virus and X-disease Phytoplasma

X-disease phytoplasma and Little cherry virus 2 cause small, pale deformed fruit in cherries. This video shows symptoms in a number of varieties.

Scouting and Sampling for Little Cherry Disease

Tips on scouting and sampling for X-disease and Little cherry disease which cause small, pale unmarketable fruit in cherries.


Mecanismos de Enfriamiento para una Huerta de Árboles Frutales

Cuando las frutas están en estados más avanzados de desarrollo, cerca de la cosecha cuando se tornan amarillas, son particularmente susceptibles. Es en estos estados, y particularmente cuando la temperatura ambiental alcanza entre 85 y…
cross pollination Granny Smith and WA38 graphic

Puntos claves acerca de la biologia floral, polinización y cuaja de fruta en WA38

Floral biology, pollination, pollinizer and fruit set information for WA38.


Opportunity Extension Coordinator Decision Aid

WSU-DAS (Decision Aid Systems)  has opened a search for an outreach / Extension professional to provide outreach to the tree fruit, vegetable, potato, and vegetable seed industries. This is an exciting opportunity – please share….

Opportunity: Horticulturist – Farm Manager, WSU TFREC, Wenatchee, WA

Orchard manager position available at WSU Tree Fruit Research Center – Wenatchee.


Virtual Honeycrisp Meetup

Virtual Honeycrisp meetup. A collaborative effort between WSU, MSU and Cornell Extension. Supported by IFTA, Root to Fruit project and Good Fruit Grower.

On site Trainings and Orchard visits on Little Cherry disease

WSU Tree Fruit Extension Team is offering on site visits to help growers, nurseries, consultants, and industry affiliates to: Identify little cherry disease (LCD) symtomatic trees prior to harvest. Inform about best management practices to…



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.


Karen Lewis
Tianna DuPont
Dani Gray
Gwen Hoheisel
Marcella Magby
Manoella Mendoza
Claire Murphy
Ricardo Lima Pinto
Jodi Rinaldi
Bernardita Sallato
Tory Schmidt
Corina Serban


The June 2021 edition of Fruit Matters was edited by Tianna DuPont, WSU Extension. To submitt to the July edition please contact Faith Critzer.

Washington State University