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WSU Tree Fruit Days

January 18 @ 8:00 am - January 22 @ 5:00 pm

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Tree Fruit Days 2021 will be an online event due to COVID19. This series of webinars is designed to provide information on key horticulture & pest management topics impacting your profitability in the short & long term. Sign up for individual 30-50 min webinar topics. No fee to attend. *Qualify for pesticide update credits with WSDA approval.

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Tree Fruit Days 2021 Agenda

Co-sponsors NCW Fieldmen’s Association, NW Pears, NW Cherry Growers.

Jan 18 @ 9:00 am Organic Apple Mildew Management*, Ashour Amiri, WSU Plant Pathology. Using new research results to improve your powdery mildew management.

Jan 18 @ 10:00 am The Latest Fire Blight Research* Kerik Cox, Cornell; Ken Johnson, OSU; Kari Peter, PSU; Tianna DuPont, WSU

Jan 18 @ 1:00 pm Selecting New Varieties Bill Dodd, Midwest Apple Improvement Association, Dr Brewster, Plant and Food New Zealand, TBA

Jan 19 @ 9:00 am Mating Disruption as a Basis for Apple IPM* Don Thomson, Pacific BioControl; Coverage is Key in Apple IPM* Gwen Hoheisel, WSU Extension. How MD works: competitive attraction. Higher populations are more difficult to control. Aerosol emitter BMPs. Potential of resistance. Coverage is essential and there are some key components that should be looked at this year to ensure that spray is reaching all areas of the canopy.

Jan 19 @ 11:00 am Codling Moth Apple IPM – Don’t Forget the Basics, SIR Update*, Betsy Beers, Matt Jones WSU Entomology. Success is influenced by weather. Monitoring basics. Rotate products. Virus in conventional IPM. Organic programs. Using cultural controls. Incorporating SIR into your IPM program successfully.

Jan 19 @ 1:00 pm The Labor Piece of the Production Puzzle Karen, Lewis, WSU Extension. De-leafers, Cyclone, Scout, pedestrian orchards.

Jan 20 @ 9:00 am Pear IPM* Louis Nottingham, WSU Entomology. Key components to successful pear IPM programs. Latest research.

Jan 20 @ 10:00 am Using Honeydew Washing to Improve Pear IPM* Chris Strohm, WSU Extension. Case studies and research results from 2020.

Jan 20 @ 1:00 pm Irrigating Pears for Quality Lee Kalcsits, WSU Horticulture

Jan 21 @ 9:00 am X-disease and Little Cherry Virus* Scott Harper, WSU Pathology; Tobin Northfield, WSU Entomology; Louis Nottingham, WSU Entomology; Cody Molnar, WSU Extension. Symptoms and Sampling. New biology information: symptom types and biological effects per-variety. Vector ID, biology and management. New vector management study results. New vector management product trial results. Tree removal case studies.

Jan 21 @ 1:00 pm Cherry Powdery Mildew Product Resistance* Gary Grove, WSU Pathology

Jan 22 @ 9:00 am Rodent Control for Orchards* Roger Baldwin, UC Davis. Efficacy of common and new rodenticides, burrow fumigants and repellents.

Jan 22 @ 10:00 am Apple Thinning* Poliana Francescatto, Valent BioSciences. How PGRs and PGR-like compounds can manipulate two of the most common practices: fruit thinning and flower formation. Current and new products.

Jan 22 @ 1:00 pm Matching Rootstocks to Scions and Varieties Jenny Bolivar, WSU Extension. Major characteristics of common rootstocks. Overview of data of honeycrisp on different rootstocks. Case studies of success.


Tianna DuPont, WSU Extension, (509) 293-8758,


January 18 @ 8:00 am
January 22 @ 5:00 pm


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