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Apple Day – North Central Washington Tree Fruit Days

January 17, 2023 @ 8:30 am - 3:30 pm

Join us for the latest research-based information. 3 WSDA and ODA pesticide update credits. In person event with hybrid virtual option.

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 Sat January 21, 2023.


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

Apple Day Topics

  • Natural Enemy Conservation Biological Control
  • When is Codling Moth a Problem? – Insights from the Codling Moth Survey
  • Refinement of Nonantibiotic Spray Programs for Fire Blight
  • The Role of Rootstocks in Plant Nutrition
  • Rootstock Replant Tolerance


3 pesticide update credits will be available per day with WSDA and ODA approval.


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.

Networking Lunch

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. Apple Day Networking Lunch Sponsored by FMC. Register for lunch!


Session 1: Pest and Disease Management
9:00 AM When is Codling Moth a Problem – Insights from the Codling Moth Survey
Chris Adams, Oregon State University

9:20 AM The good the bad and the ugly of climate change and insects
Sonia Hall, Kirti Rajagopalan, WSU Biological Systems Engineering

9:40 AM Apple IPM reminders
Rob Curtis, WSU Entomology
Effective codling moth management as a basis for apple IPM. Mating disruption, monitoring, organic controls. New research.

10:10 AM Break

10:30 AM Natural enemy conservation biological control ‐ mitigating pesticide non-target effects
Rebecca Schmidt Jeffris, USDA Wapato
This talk will cover where to find information on pesticide non-target effects, overview pesticide non-target effects on apple natural enemies, and provide a brief research update on ongoing research.

10:55 AM Fire Blight Biology Insights to Management: New Research from Around the World
Tianna DuPont, Aina Baro, WSU Extension; Frank Zhao, Ricardo Delgado, WSU Plant Pathology
Overwintering cankers. Flower vs tree susceptibility. Shoot blight infection points. Movement in the plant. pH in the floral cup.

11:25 AM Fire Blight. Refinement of Nonantibiotic Spray Programs for Fire Blight
Ken Johnson, Oregon State University
What have we learned from 29 trials between 2013 and 2021 in Oregon. Efficacy of combined non-antibiotic programs.

11:55 AM Lunch Sponsored by FMC

Session 2: Mitigating Climate Impacts

1:10 PM Vulnerabilities Due to Climate on Water Supply
Jenny Adam, Sonia Hall, Civil and Environmental Engineering WSU
We will examine the long-term water supply and demand forecast for the Columbia River Basin as a whole, with an emphasis on eastern Washington. The vulnerability of meeting future water needs to climate change will be examined and compared across watersheds.

1:35 PM Netting for Hail and Sunburn Prevention
Noah Willsea, Lee Kalcsits, WSU Horticulture
Sunburn basics. Review of cooling and particle films. Methods to optimize netting for hail, sunburn prevention and color.

2:00 PM Matching Irrigation Efficiency with Tree Needs Panel
Grower panel. Rob Mc Graw, Gilbert Fruit; Cody LaRiviere, Washington Fruit; Mike Meadows, Wenatchee Orchardist
Use of sensors, scheduling, automation and deficit irrigation to meet irrigation needs and optimize fruit quality.

Session 3: Rootstocks
2:40 PM Role of Rootstocks in Plant Nutrition
Lee Kalcsits, Erica Casagrande Biasuz, Victor Blanco, Nadia Valverdi

3:05 PM Rethinking Rootstock Tolerance to Replant Disease
Tracey Somera, USDA ARS Wenatchee

How does rootstock tolerance differ according to genotype? Utilization of rootstocks with amendment-based disease control strategies. Improving our ability to utilize tolerant rootstocks.

3:30 PM Closing and Pesticide Credits




Christopher Adams an Assistant Professor of Tree Fruit Entomology at the Mid-Columbia Agricultural Research & Extension Center in Hood River.  His lab is focused on pests of pear and cherry including our current invasive species, spotted wind drosophila (Drosophila suzukii) and the brown marmorated stink bug (Halyomorpha halys). Other projects include the understanding the ecology and control of the leafhoppers that vector the phytoplasma responsible for cherry X-disease, and the landscape ecology and biocontrol of pear psylla.

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.

Rob Curtis is a Research Entomologist for WSU at the Tree Fruit Research Center in Wenatchee.

Rebecca Schmidt-Jeffris, Research Entomologist USDA ARS. Her lab focuses on biological control of arthropod pests of tree fruit, including apples, pears, and cherries.

Tianna DuPont is a Tree Fruit Extension Specialist. Her work focuses on helping growers understand and apply research based solutions for tree fruit pests and pathogens.

Ken Johnson is a Professor of Plant Pathology with Oregon State University. His recent work has focused on control of fire blight in pear and apple and area for which he is world known, as well as epidemiology of blackberry rust, rapid detection of bacterial pathogens on seeds and flowers, and utilization of systemic acquired resistance for enhancement of plant health.

Jennifer Adam is the Berry Distinguished Professor in the Department of Civil & Environmental Engineering at Washington State University. She received her graduate degrees in Civil Engineering at the University of Washington, and her undergraduate degree at the University of Colorado.

Noah Willsea is a Master’s student in WSU Department of Horticulture. His work focuses on tree fruit physiology, specifically apple sunburn management, red color development, and fruit quality.

Lee Kalcsits is an Associate Professor in WSU Department of Horticulture. His work focuses on tree fruit physiology, abiotic stress, plant nutrition and impacts of preharvest environment on postharvest physiology.

Tracey Somera is a Microbiologist at the USDA-ARS, Tree Fruits Research Unit in Wenatchee, WA. Her research is largely geared toward engineering soil and plant-associated microbiomes to directly benefit fruit tree production systems. This includes utilizing host plant genetics in combination with other strategies as part of an integrated approach to mitigating the detrimental effects of apple replant disease.


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 17, 2023
8:30 am - 3:30 pm


WSU Extension – Tianna DuPont
(509) 293-8758


Wenatchee Convention Center
Wenatchee, 98801 United States + Google Map
Washington State University