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Okanogan Horticultural Society Summer Field Day

July 28 @ 10:00 am - 12:00 pm

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Date: July 28, 2021

Time: 10:00 am to 12:30 pm

Location 1: 31883 Hwy 97 Tonasket WA

Location 2: 44 Inlow Loop Rd Tonasket WA


Approved for 2 WSDA pesticide recertification credits.


10-10:30 am          Pear Psylla Management- New Models and Refined IPM* – Louis Nottingham, Robert Orpet WSU Entomology

Nottingham will demonstrate the new pear psylla phenology model and how to use phenology-based information and new pesticide efficacy information for an integrated psylla management program. Join the facilitated discussion.


10:30-11:00 am     Natural Enemy Scouting for Psylla Biocontrol* – Louis Nottingham, Robert Orpet, WSU Entomology

Growers will have an opportunity to scout for key pear natural enemies and learn to identify them.


11:00-11:15 am     Apple Maggot Update* – Mike Bush, WSDA

Overview of apple maggot finds in Okanogan County and what a quarantine will mean for growers/packers if initiated.


11:15-11:30 Drive to location 2


11:30-11:45 am    X-disease and Little Cherry Virus Management* Update – Abby Clark, WSU Entomology

Update on leafhopper vectors of X-disease. View specimens of key leafhopper pests of X-disease. Presentation of management tactics.


11:45-12:00 pm     Why are My Trees Dying – Crown Rot, White Rot, and other Slow Killers*  – Tianna DuPont, WSU Extension 

DuPont will show specimens of trees affected by root rots and discuss how to diagnose and manage these plant pathogens.


12:00-12:15 pm     Replant Disease Trial Show and Tell* – Tianna DuPont, WSU Extension 

Tour of mustardmeal and anaerobic disinfestation alternatives to replant management trial.


*Topics covered: Integrated Pest Management (IPM), including use of biological & nonchemical means of control, pest identification and lifecycles


Louis Nottingham is an entomologist for Washington State University examining tactics for managing psylla and mites. His primary focus is developing season-long management programs that involve cultural methods and properly selected and timed insecticide sprays to suppress psylla and mites while minimizing impacts on natural enemies.

Tianna DuPont is a Regional Extension Specialist for Washington State University. Her program focuses on sustainable pest and disease management and bringing research based information to Washington Orchardists.

Mike Bush is an Entomologist for the Washington State Department of Agriculture. He runs the Apple Maggot program for the state.

Abby Clark is a graduate student in Entomology at Washington State University.


Contact Jason Unruh, Okanogan Horticultural Association with questions or to be added to the mailing list to hear about future events at (509) 429-0648 <>


July 28
10:00 am - 12:00 pm


WSU Extension – Tianna DuPont
(509) 293-8758
Washington State University