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Okanogan Horticultural Society Meeting

February 9 @ 9:00 am - 3:30 pm

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Join us for Okanogan Horticultural Society Day. We plan to have a full day of pest management and horticultural information for you. 3 WSDA pesticide update credits will be available pending WSDA approval.

Co-sponsored by:  WSU Extension and Okanogan County Horticultural Association

No pre-registration required.


  • Apple Maggot Fly Discovered in Hawthorns in the Okanogan Valley
  • Update on Apple Maggot Survey, What a Potential Quarantine Expansion Would Mean for Growers
  • Pear Psylla Management
  • Site Preparation for a Successful New Planting
  • Vigor Management in WA38

and More!


Okanogan Horticultural Assoc. Annual Meeting
February 9, 2022
Okanogan County Agriplex (County Fair Grounds)
175 Rodeo Trail, Okanogan, WA 98840
3 WSDA pesticide update credits pending approval.
In-person event. Co-sponsored by Okanogan County Horticultural Association.

9:30 AM Starting the Orchard Off Right*  – Tianna DuPont, WSU Extension (live)
Site assessment, pre-plant fumigation, alternative organic biorenovation options, organic matter

10:00 AM New Tools for Codling Moth Management*Betsy Beers, WSU Entomology (virtual)
The research and how to use it on SIR, nematodes, netting and other tools to add to high pressure codling
moth blocks. (recorded presentation)

10:30 AM Break

10:45 AM Apple Maggot Fly Discovered in Hawthorns in the Okanogan Valley*Wee Yee, USDA ARS (virtual)
Apple maggot fly was discovered infesting long-thorn hawthorn in the Okanogan Valley in 2020 by the
Washington State Department of Agriculture during its annual apple maggot survey program.
Experiments suggest that the flies there have already adapted to this species of hawthorn although the
flies may still attack apples.

11:10 AM Update on Apple Maggot Survey, What a Potential Quarantine Expansion Would
Mean for Growers* – Bill Walker, WSDA (live)
Apple maggot survey results, what triggers a quarantine, inspection and cold treatment requirements for
fruit from quarantine areas.

11:35 AM New Opportunity: Create Pollinator Habitats Rena Shawver, Okanogan Conservation District

11:40 AM Lunch

12:50 PM Pear Psylla Management* – Louis Nottingham, WSU Entomology (live)
Season-long psylla management for pear. Cultural controls. Insecticide efficacy. Timing.

1:40 PM Vigor Management in WA38Bernardita Sallato, WSU Extension (live)

2:10 PM Irrigation for Fruit Quality and Efficiency Troy Peters, WSU Extension Biological Systems Engineering (live) Irrigation strategies to improve fruit quality. Irrigation efficiencies for water conservation. Evaluating your block for irrigation challenges.

2:40 PM Closing and Pesticide Credits


Vendors contact Corbin Moser to reserve your space at the trade show (509) 560-9389

 WSDA Pesticide education certification credits awarded for program attendance.

Extension programs and employment are available without discrimination. Evidence of noncompliance may be reported through your local Extension Office.

 All agendas are draft and subject to change.


February 9
9:00 am - 3:30 pm


WSU Extension – Tianna DuPont
(509) 293-8758


Okanogan County Agriplex
Omak, WA United States + Google Map
Washington State University