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Stone Fruit Day – North Central Washington Tree Fruit Days

January 18 @ 8:30 am - 3:30 pm

Join WSU Extension for the latest research-based information. 3 WSDA and ODA pesticide update credits. Co-sponsor Northwest Cherry Growers.

North Central Washington Tree Fruit Days

Join us for WSU Tree Fruit Extension Programs in North Central Washington. Co-sponsored by Northwest Cherries, Pear Bureau Northwest, NCW Fieldmen’s Association, Chelan Future Farmers of America and the Okanogan Horticultural Association. These events provide the latest research-based information on horticulture, pest and disease management. We hope you will join us to network and learn this winter. Apple, Pear and Cherry Day will be held in Wenatchee, WA January 17-19, 2023 with a virtual webinar option. Okanogan Horticultural Day February 7, 2023.. Lake Chelan Horticultural Meeting Saturday January 21, 2023.


Events in 2023 will be held in person with a virtual option through zoom webinars for Apple, Pear and Stone Fruit Days.

Stone Fruit Day Topics

Topics this year include:

Session 1: Insect & Disease management

  • Western Cherry Fruit Fly and Spotted Wing Drosophila – Best Management Practices, New Cultural Controls and Techniques Coming Down the Pipeline
  • X-disease and Little Cherry Disease
  • Powdery Mildew

Session 2: Pollinators and Pollination

  • Cherry Horticulture Updates
  • Alternative Pollinators
  • Pollination in a Changing Environment


3 pesticide update credits WSDA and ODA.


Registration is required for virtual webinar attendance. In person attendees are welcome to register to have a back-up attendance method through the webinar link. Walk-ins okay for in person participation. Register for virtual attendance.


Join us for the sponsored networking lunch which provides an opportunity to learn and network with your peers and visiting speakers. Sponsored lunch limited to the first 100 attendees per day. Stone Fruit Day Lunch sponsored by GS Long. Register for lunch!


Session 1: Pest, Weed and Disease Management
9:10 AM Western Cherry Fruit Fly and Spotted Wing Drosophila – Best Management Practices, New Cultural Controls and Techniques in the Pipeline
Betsy Beers, Dylan Beal, WSU Entomology
Best management practices for Western Cherry Fruit Fly (WCFF). Organic post harvest management of SWD and WCFF. Introduction to new SWD baits. Identification tools.

9:35 AM Decoys and Waxes – Potential New Tools for the SWD Toolbox
Information will be shared of the mechanism and efficacy of two non-toxic tools in the IPM toolbox against Drosophila suzukii, (Spotted-wing drosophila, SWD). Additional information will be shared of possible integrated strategies for using these tools within a whole-system context.
Vaughn Walton, Oregon State University

10:00 AM Break

10:15 AM Powdery Mildew and Shot Hole Management
Gary Grove, WSU Plant Pathology
Mildew update. Resistance management. Cherry leaf spots including shot hole.

10:40 AM X-disease Vector Management in Washington State
Adrian Marshall, Tobin Northfield, WSU Entomology
Identifying the leafhopper vectors of X-disease, statewide distribution and seasonal infectious levels, monitoring, cultural controls and efficacious spray rotation.

11:05 AM Elections

11:15 AM Stone Fruit Viruses
Scott Harper, WSU Plant Pathology
In addition to little cherry virus a number of viruses affect sweet cherry. Cherry leafroll, prune dwarf virus, cherry mottle leaf, cherry rasp leaf, cherry twisted leaf, necrotic rusty mottle, rogose mosaic.

11:40 AM Pre-emergent Herbicides: Timing Trials and Product Review
Mike Basedow, Cornell University
Mike will discuss results from his multi-year pre-emergent herbicide timing trials at two field sites in New York. He will provide some practical tips for fall herbicide applications to maximize product efficacy, and will briefly review some pre- and post-emergent herbicide products.

12:10 PM Lunch Sponsored by GS Long

Session 2: Pollination and Pollinators
1:20 PM Seasonal Effects on Bud Formation, Fruit Set and Pollination
Matt Whitting, WSU Horticulture

1:45 PM Sweet Cherry Cold Hardiness Research
Jon Magby, WSU Horticulture

2:10 PM Pollination with Blue Orchard Bees – Benefits and Management
Theresa Pitts Singer, Lindsie McCabe, USDA, Logan Utah
The life history and unique characteristics of blue orchard bees will be highlighted along with research on their efficacy in cherry pollination and bee reproduction in the Washington cherry environment.

2:40 PM Conservation Plantings for Bees and Beneficials
Reasons to consider conservation plantings. Tips on how to make the most inviting space for pollinators and beneficial insects. Resources to help you accomplish your goals.
Angela Orpet, Xerces Society

2:55 PM Changing Climate Impacts on Pollination
Kirti Rajagopalan, WSU Biological Systems Engineering

3:15 PM Closing and Pesticide Credits


Betsy Beers, Professor and Entomologist, WSU Department of Entomology, Tree Fruit Research and Extension Center. Beers has worked for 30+ years on integrated pest management of apple and cherry pests.

Vaughn Walton is the Horticultural Entomologist in the Department of Horticulture at Oregon State University. His work focuses on biology and management of key pests in perennial horticultural crops.  His work has resulted in several technologies of that have been adopted into industry.

Gary Grove is a Professor in WSU Department of Plant Pathology. His work focuses on epidemiology and management of fungal diseases of stone fruits; disease forecasting and fungicide resistance management.

Tobin Northfield is an Assistant Professor for WSU Department of Entomology. He leads an interdisciplinary task force comprising researchers and representatives from government and industry that works to improve management X-disease and Little cherry disease. He leads a project focusing on X-disease vector management including the use of cultural controls such as Surround and Extenday.

Scott Harper is an Assistant Professor for WSU Department of Plant Pathology. His research program focuses on viruses and other systemic pathogens of perennial crops in the Pacific Northwest.

Mike Basedow is a Tree Fruit Specialist for Cornell Cooperative Extension. Mike delivers educational programming and conducts applied research relevant to orchards across the Eastern New York region, primarily in the areas of cultural orchard practices and pest management.

Matt Whiting is a Professor of Horticulture for Washington State University. His focus is on: whole-tree physiology, high efficiency orchard architecture, incorporating automation/mechanization in fruit production systems, environmental control of fruit quality, and pollination biology.

Theresa Pitts Singer has worked as a Research Entomologist at the USDA-ARS Pollinating Insects Research Unit in Logan, UT since 2002.  Her research on alfalfa leafcutting bees and blue orchard bees focuses on specific factors that affect reproduction and pollination efficacy, on chemical cues that are used in nest establishment and individual nest recognition, and on effects of certain pesticides on bee mortality and behavior.

Angie Orpet works with agricultural producers in the inland Pacific Northwest to create pollinator friendly habitat. She has been collaborating with farmers since 2016 to help with resource needs in perennial and annual crops.

Kirti Rajagopalan is part of the Land, Air, Water Resources, and Environmental Engineering emphasis area of the Department of Biological Systems Engineering at Washington State University. Her modeling group develops and utilizes a variety to modeling approaches to better understand and manage water and agricultural resources. The group focuses on trans-disciplinary efforts to problem solving and works closely with colleagues from a broad range of disciplines including engineering, economics, entomology, physiology, statistics, and agronomy.


To join the tradeshow please contact the NCW Fieldmen’s association at

Credits Q&A

WSDA and ODA pesticide update credits have been approved for the workshop. To receive credits for online attendance, participants must:

  1. Register each participant including pesticide license information. Make sure registrant name matches name on license.
  2. Attend the full morning session. The webinar software tracks the number of minutes each attendee has participation. 3 credit sessions require 150 minutes of pesticide related content.
  3. Respond to poll questions and check-ins during the workshop.

Common Zoom Problems and Trouble Shooting

  • Cannot enter the webinar.
    • Early? If you are early you will receive a message that the meeting has not started yet. Just wait and we will have webinar open soon.
    • Enter the passcode: you can attend the meeting without a zoom account, but you have to enter the passcode to get in. Passcode: 1111.
  • All online participants will be required to have a zoom account to sign in due to WSU security policies. Go to to sign up (free) and don’t forget to check your email to confirm. Please make sure to sign in early and check that zoom is working for you and that recent updates have been downloaded.
  • No sound
    • Check your audio settings in zoom. Click on the up arrow close to the microphone icon at the bottom of your screen. Choose audio settings and check that you have the correct speaker and microphone checked.
    • Check your audio in your computer settings.
  • Still having trouble. Call (509) 293-8792. Note these phone numbers will be forwarded to volunteers during the hour before and after the webinar starts as Tianna will be running the meeting.

Common questions:

  • Can I have multiple people watching on one computer? The webinar host can only verify attendance for each logged in participant. If it is not possible for each participant to login separately, please contact Tianna (509) 713-5346 in advance to designate a host for your site who can verify attendance.


January 18
8:30 am - 3:30 pm


WSU Extension – Tianna DuPont
(509) 293-8758


Wenatchee Convention Center
Wenatchee, 98801 United States + Google Map