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Expert Presentations

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Featured below are links and a brief description to WSU YouTube videos with educational content that includes invited seminars, presentations at meetings, “how to’s” in the field, lab visits, field day events, etc. Items in the list are arranged chronologically with the newest video at the top.

Symptoms of Little Cherry Virus and X-disease Phytoplasma

X-disease phytoplasma and Little cherry virus 2 cause small, pale deformed fruit in cherries. This video shows symptoms in a number of varieties.

X-disease Vector Management

Tobin Northfield, WSU Entomology shows how to identify and trap for important leafhopper vectors of X-disease phytoplasma.

Using Irrigation Sensors – Troy Peters

WSU Biological Systems Engineering’s Troy Peters describes common types of irrigation sensors and how to use them. Part of ‘Virtual Fielday’ May 2020. Virtual Field Day hosted by Tianna DuPont, WSU Extension, Troy Peters, WSU…

Cost Share Availability – Irrigation Efficiencies Virtual Field Day

Sandy Letzing, Cascadia Conservation discusses cost share availability at ‘virtual field day’ May 2020. Virtual Field Day hosted by Tianna DuPont, WSU Extension, Troy Peters, WSU Biological Systems Engineering, Lee Kalcsits, WSU Horticulture. Project funders…

Irrigation Sensors with Jac LeRoux – Improving Irrigation Efficiency in Pears Virtual Field Day

Jac LeRoux, Wilbur Ellis company discusses irrigation sensors at WSU Extension ‘Virtual Field Day’ May 2020. Virtual Field Day hosted by Tianna DuPont, WSU Extension, Troy Peters, WSU Biological Systems Engineering, Lee Kalcsits, WSU Horticulture….

Scouting and Sampling for Little Cherry Disease – Part 1 – WSU-OSU Webinar Session 3

Scott Harper, WSU Plant Pathology, and Tianna DuPont, WSU Tree Fruit Extension, will discuss scouting and sampling for X Phytoplasma and Little Cherry Virus including recognizing symptoms, what to sample, where and when to sample….

Long Case Study Improving Irrigation Efficiency in Pears

Tianna DuPont, WSU Extension discusses with grower Brandon Long the results of a case study plot they implemented in a pear block with a history of cork. Watering using data from irrigation sensors reduced cork…

Improving Irrigation Efficiency in Pears Caudle Case Study

Pear irrigation systems can have challenges such as low pressure, run off, too much or too little water and clogging filters resulting in pears with cork or small size. Larry and Renee Caudle in Dryden…

WSU – OSU Webinar: Artificial Intelligence, Cyber-Physical Systems and Robotics for Agriculture

Decreasing availability and increasing cost of farm labor is a critical challenge faced by the agricultural industry around the world. Robotics has played a key role in reducing labor use and increasing productivity in farming….

How to build a soil pit to evaluate and improve your apple orchard

Bernardita Sallato demonstrates how to create and use soil pits to better manage, and improve the health of commercial apple orchards. Sallato is a Washington State University tree fruit extension specialist in Prosser, Washington.

Como construir una calicata para evaluar y mejorar tu huerto de manzana

Bernardita Sallato demuestra como crear y utilizar una calicata para mejorar la salud de los huertos de manzana comerciales y la administración de los mismos. Sallato es una especialista de la extensión de fruta de…

Flowering Fruit Set & Pollination

Flowering is a critical time for growers because fertilization rate has a fundamental relationship to yield and there is a short window of opportunity to set the crop for the year. The processes of pollination…

Taking time when testing WA 38 (COSMIC CRISP®) maturity

Ines Hanrahan, executive director of the Washington Tree Fruit Research Commission, shows differences in testing apple maturity between Granny Smith and WA 38 (COSMIC CRISP®) using an iodine starch test. Learn more about the recently…

Para mejorar la calidad de fruta, utilice el análisis de suelo

El análisis de suelo es fundamental para el manejo de la nutrición del huerto. En este video, Bernardita Sallato nos muestra cómo tomar la muestra de suelo en un huerto frutal.

WA 38 Fruit Quality Update 2019

Dr. Ines Hanrahan, Executive Director for the WA Tree Fruit Research Commission, presents information about WA 38 fruit quality studies including recent results and future plans. This presentation was part of the 2019 Apple Day…

WA 38 Horticulture Update 2019

Dr. Stefano Musacchi, Endowed Chair of Tree Fruit Physiology & Management at WSU, discusses the most recent information about the best horticultural practices for WA 38 apple trees and updates on related research. There is…

WA 38 ‘Cosmic Crisp™’ Fall Field Visits – Part 2

The WA 38 (or Cosmic Crisp™) trial compares vertical spindle, bi-axis and V-trellis training systems and both the M9-Nic29 and Geneva 41 rootstocks. Trial results are discussed by trial participants. Topics discussed include pruning and…

WA 38 ‘Cosmic Crisp™’ Fall Field Visits – Part 1

Drs. Bruce Barritt, Ines Hanrahan and Mr. Tom Auvil describe WA38 ‘Cosmic Crisp™’ cultivar characteristics, tree handling, rootstocks, pollination, thinning, the issue of stem punctures, stem clipping, fruit size, shape, color and post harvest performance.

Photoselective Anti-hail Netting Trial for ‘Honeycrisp’ Apple

An evaluation of the use of photoselective anti-hail netting is underway to reduce sunburn and improve productivity of ‘Honeycrisp’ apple in trials a commercial orchard in Quincy, WA. This video describes the methods used and…

Photo-selective Netting-An Integrated Agro-technology: Improving Fruit Production While Coping With Environmental Constraints

Dr. Shahak presents an invited expert seminar reviewing research around the world where anti-hail shade nets of various colors have been used to alter the field microclimate and bring about various positive benefits for plants.

Pruning Bartlett Pears to Optimize Fruit Quality

Dr. Stefano Musacchi provides a tutorial on pruning Bartlett pear trees to optimize fruit quality. This includes using the concept of dynamic or renewal pruning, and the techniques of girdling, notching and limb bending. He…

Weed Control in Orchards

On January 19, 2015 David Granatstein spoke at the Lake Chelan Hort Day about why weed control is needed in orchards, weed control options, herbicides and other choices, and economics. He also discussed the results…

Powdery Mildew Infection of Sweet Cherries: Expect the Unexpected

Dr. Claudia Probst discussed the relationship between host susceptibility, environment and timing in cherry powdery mildew disease development. She noted that sweet cherries are more susceptible to fruit infection as you get closer to harvest…

Apple Varieties of the Future from WSU’s Apple Breeding Program

Dr. Kate Evans describes the four precision breeding techniques that she uses in her WSU apple breeding program: 1. DNA-informed choice of parents; 2. DNA-informed selection of seedlings; 3. Extensive evaluation of fruit; and 4….

Utilizing the WSU-DAS Version of the Spray Guide

Dr. Ute Chambers explains how the WSU Decision Aid System ( can be used as a tool for making decisions for managing pests in your orchard. She also spoke about some new features including e-mail…

The Evolution of Tree Fruit Pest Management Practices

Dr. Jay Brunner provides a historical perspective on pest management practices for apple in the Pacific Northwest. He reviews historical crises and the value of biological control.

Are You In The Know? Resources That You Should Be Utilizing

Dr. Desmond R. Layne provides an overview and specific examples of resources that people in the fruit industry can use for self-education. He distinguishes unbiased, research-based, peer-reviewed information with other types such as that provided…

Integrated Management of Postharvest Diseases of Pome Fruit

Dr. David Sugar (Oregon State University) emphasizes the management of postharvest diseases caused by fungi that enter pears through wounds (particularly during the harvest process).

A Tale of Two Mites: Ambyldromella caudiglans and Galendromus occidentalis in Washington Apple

Ms. Schmidt-Jeffris discusses predatory mite biodiversity in Washington apple orchards. She offered a brief history of integrated mite management in apple in the Pacific Northwest.

Root Physiology and Function in the Orchard

Dr. Lee Kalcsits provides an educational presentation reviewing root function and physiology in the orchard during the program “Roots: Foundation of Your Orchard’s Success” at the 2014 WSHA Annual Meeting, Kennewick, WA, December 3, 2014.

Roots Program Speaker Panel Question and Answer Session

More Video recording of the panel discussion with Dr. Lee Kalcsits, WSU-TFREC (Wenatchee, WA), Dr. Gennaro Fazio, USDA-ARS (Geneva, NY), and Dr. Mark Mazzola, USDA-ARS (Wenatchee, WA), as part of the program “Roots: Foundation of Your Orchard’s…

Roots and Soil Biology: Managing the “Microherd” for Maximum Tree Performance

More Video presentation by Speaker #4 – Dr. Mark Mazzola, USDA-ARS (Wenatchee, WA), as part of the program “Roots: Foundation of Your Orchard’s Success” at the 2014 WSHA Annual Meeting, Kennewick, WA, December 3, 2014. To see…

Characteristics of Tree Root Systems

More Video presentation by Speaker #3 – Dr. David Eissenstat, Penn State Univ. (University Park, PA), as part of the program “Roots: Foundation of Your Orchard’s Success” at the 2014 WSHA Annual Meeting, Kennewick, WA, December 3,…

Optimal Tree Nutrition and Fruit Production Begins Underground – The Apple Rootstock Story

Dr. Gennaro Fazio provides an educational presentation reviewing the role of rootstock in apple tree nutrition and fruit production during the program “Roots: Foundation of Your Orchard’s Success” at the 2014 WSHA Annual Meeting, Kennewick,…

Fruit Testing at the WSU Apple Breeding Program

More Dr. Kate Evans and her apple breeding team take us on a tour during a typical day in her Fruit Quality Evaluation Laboratory. Specifically, Kate will speak about the broader goals of the apple…

The Hows and Whys of Soil Testing

More This video captures an invited seminar by Dr. Joan Davenport, WSU Crop and Soil Sciences Dept. (IAREC-Prosser, WA), presented at WSU-TFREC in Wenatchee on October 29, 2014.  This seminar focuses on four main topics:…

Cosmic Crisp™ WA 38 Field Days

More This video was recorded at two commercial grower field days on September 17 and 30, 2014. It provides the viewer with a look at the Cosmic Crisp™ WA 38 apple both at Washington State…

The Potential for Precision Soil Management in Orchards

More This video captures an invited seminar by Dr. Dave Brown, WSU Crop and Soil Sciences Dept. (Pullman, WA), presented at WSU-TFREC in Wenatchee on August 13, 2014. This seminar presents the concepts of precision…

The Future of IPM in Orchard Crops

More Speaker: Dr. Vince Jones, Professor of Entomology and Director of WSU-DAS. Affiliation: Washington State University, Tree Fruit Research and Extension Center, Wenatchee, WA 98801. Synopsis: Dr. Vince Jones was invited to give his unscripted opinion about the future of…

Tree Fruit Research and Extension at WSU

More This video presents an overview of the range and types of research Washington State University scientists at the Tree Fruit Research and Extension Center at Wenatchee do in support of the Washington tree fruit industry….

WSU’s Sunrise Research Orchard

More Washington State University, in collaboration with the state’s tree fruit growers, has established a state-of-the-art research orchard near Wenatchee, Wash. This short video provides a brief overview of the types of research being conducted…

Interview with Gerrit Hoogenboom, Director of AgWeatherNet

Washington State University