Professor
pscheidj [at] science.oregonstate.edu

Office: 541-737-5539
Other: 541-740-6621

Cordley Hall

Cordley Hall 2621

2701 SW Campus Way

Corvallis, OR 97331

My work focuses on diagnosis of disease problems on woody perennials including fruit, nut, and nursery crops, and cultural disease control tactics.

Research Description:

Research and Extension Area: Develop applied diagnostic and control programs for plant diseases of tree fruits, nuts, berries, grapes, ornamentals/nursery, Christmas trees and turf.

Many fungal and bacterial diseases are a constant problem for fruit and ornamental/nursery production in Oregon. Pathogen biology and life histories are studied in the field and lab to improve disease control recommendations. Screening biologicals, pesticides, or cultural practices effective against these organisms is an ongoing need valuable to Oregon's growers. Information is delivered to clientele using the latest techniques and technologies including satellite systems and the World Wide Web.

Research Group Members

Faculty Research Assistants/Associates

At OSU

Affiliated with:

Ag Botany / Plant Path

Headquarters:

OSU Main Campus

Career Links:

Profile on Department of Botany and Plant Pathology website

Pacific Northwest Plant Disease Management Handbook

The Eastern Filbert Blight Homepage

Fruit and Ornamental Disease Management Testing Program

Intelligent Spray System

Phytophthora Online Course:Training for Nursery Growers

Student(s):

Gabriel Sacher

Courses Taught:

BOT 553 Plant Disease Diagnosis

Professional Accomplishments

Curriculum Vitae:

professor_pscheidt_cv_2010_to_2020.docx

My Awards

My Publications

Outreach and Extension

Extension Service Site Publications

(2023) 2023 Willamette Valley Pest Management Guide for Cherries Get updated recommendations for insect, mite and disease control in cherry orchards of the Willamette Valley.
(2023) Pesticide Redistribution and Its Implications on Pesticide Efficacy Pesticides that penetrate plant tissues or move to other parts of the plant may be more effective than pesticides that do not redistribute. Factor this property into your pesticide choice.
(2023) Pesticide Redistribution and Its Implications on Pesticide Efficacy
(2023) 2023 Pest Management Guide for Wine Grapes in Oregon Learn the most effective techniques for controlling insects, weeds and disease on wine grapes in Oregon. This comprehensive publication for growers covers strategies for controlling powdery mildew, botrytis bunch rot and spider mites, in addition to resources for organic growers. Easy-to-read tables list pesticide application rates and timing.
(2023) Oregon Ash: Insects, Pathogens and Tree Health Oregon ash grows along the streams and wetlands of western Oregon and Northern California, where it provides important wildlife habitat. But these trees are threatened by the emerald ash borer, an insect pest that has spread from Europe and the eastern U.S. Because ash trees often suffer damage from common pests and diseases, emerald ash borer infestation can be hard to distinguish. This guide focuses on damage from insect pests such as the Oregon ash bark beetle, foliage diseases like leaf spot, or even issues like drought and heat. Here's what you need to know to rule out emerald ash borer.
(2022) Identifying Serious Virus and Phytoplasma Symptoms in Your Cherry Orchard Controlling viruses and phytoplasmas is vital to the state’s cherry industry. Cherry viruses and virus-like problems such as phytoplasmas are common in Oregon orchards The most serious viruses spread quickly throughout a growing region, significantly reducing fruit quality and yield.
(2022) Identifying Serious Virus and Phytoplasma Symptoms in Your Cherry Orchard
(2022) Getting Ahead of X-disease X-disease has become a cyclic problem on the West Coast as outbreaks of X-disease emerge every 20 years or so. Understanding X-disease and identifying and removing infected trees will help break this cycle.
(2022) Getting Ahead of X-disease
(2023) 2023 Hazelnut Pest Management Guide for the Willamette Valley Learn how to control insects, weeds and disease during each stage of hazelnut growth.
(2020) Managing Diseases and Insects in Home Orchards Learn the best ways to manage pests and disease on your fruit trees. Often, this involves combining multiple methods — from cultural and biological practices to pesticides. Learn what it takes to protect your apple, pear, cherry, peach and plum trees from insects and disease.
(2021) How to Do Regular Maintenance on Air Blast Sprayers to Ensure Proper Care for Specialty Crops
(2020) Is tobacco dangerous for my garden?
(2019) Jay Pscheidt, Plant Pathologist Jay Pscheidt is a plant pathologist and Extension researcher who works with the Oregon Wine Research Institute, based at Oregon State University. His research focuses on a “smart” sprayer that is run by a computer and sensors to determine when to spray, a savings in pesticide, water and time.

Special Thanks to:
Bill Boggess, Executive Associate Dean, OSU College of Agricultural Sciences
Danielle Gabriel, inspiration for OWRI research video series
http://owri.oregonstate.edu/
(2020) The Care and Maintenance of Wood Shingle and Shake Roofs
(2019) How to deal with a vineyard powdery mildew outbreak A powdery mildew infection on grape vines is among the last things a grape grower wants to see. An infection can destroy fruit and wine quality. But if powdery mildew shows up, there is a rescue plan.
(2019) Can I compost plants with powdery mildew?
(2019) Hazelnut IPM Resources about integrated pest management for hazelnuts.
(2019) Sensor Sprayers for Specialty Crop Production
(2018) OSU Fruit & Ornamental Disease Management Testing Program Access Dr. Jay Pscheidt's research archives for results of product testing and disease management for wine grapes among other fruit and ornamental crops.
(2015) Blueberry bacterial and fungal diseases Pacific Northwest blueberry growers must identify and control a number of bacterial and fungal diseases in order to ensure the highest yields. Fortunately, only a few of the diseases that occur on highbush blueberry in this region cause significant losses when left unchecked.
(2018) Viral Disease Progress of Blueberry Shock This animation depicts the 9 year spread of the Blueberry shock virus (BlShV) through a half acre of susceptible highbush blueberry plants.
(2018) Eastern Filbert Blight A fungal canker disease of hazelnut that threatens production in Oregon but can be managed through pruning, fungicides and resistant cultivars.
(2018) Phytophthora Online Course: Training for Nursery Growers n this course, you will learn about Phytophthora so that you can reduce the risk of Phytophthora disease in your nursery.
(2018) Fruit and Ornamental Disease Management Testing Program The primary purpose of the fruit and ornamental disease management testing program is to provide Oregon growers, Extension Faculty, and Field Representatives with unbiased information on the relative efficacy of fungicides, fungicide schedules or cultural practices for control of plant diseases. Their objective is to broaden the scope of methods used to reduce crop loss due to diseases and to service the diverse management practices of Oregon growers.
(2018) Eastern Filbert Blight Help Page Eastern filbert blight is a fungal disease that threatens the hazelnut industry of the Pacific North West. This web site covers the biology and management of this plant disease. Site includes an interactive life cycle, in depth discussion on various management options and references.
(2016) Beware of Boxwood Blight!
(2015) Mummy Berry Management in the Pacific Northwest
(2013) Growing Hazelnuts in the Pacific Northwest: Integrated Pest Management
(2010) Bacterial Canker of Sweet Cherry in Oregon
(2021) Phytophthora ramorum: A Guide for Oregon Nurseries
(2006) Sudden Oak Death and Phytophthora ramorum: A Guide for Forest Managers, Christmas Tree Growers, and Forest Tree Nursery Operators in Oregon and Washington
(2023) 2023 Pest Management Guide for Tree Fruits: Hood River, The Dalles, White Salmon, Rogue Valley, Umatilla County
(2023) 2023 Pest Management Guide for Peaches
(2023) 2023 Willamette Valley Pest Management Guide for Cherries
(2023) 2023 Pest Management Guide for Wine Grapes in Oregon
(2023) 2023 Hazelnut Pest Management Guide for the Willamette Valley
(2018) 2018 Blueberry Pest Management Guide for the Willamette Valley
(2023) 2023 Pest Management Guide for Apples: Willamette Valley
(2021) 2022 PNW Plant Disease Management Handbook
(2013) Scouting for Grape Powdery Mildew
(2022) 2022 Willamette Valley Pest Management Guide for Walnuts
(2019) 2019 Pear Pest Management Guide for the Willamette Valley
(2020) Managing Diseases and Insects in Home Orchards
(2000) Controlling Diseases and Aphids on Your Roses
(1999) Detecting and Controlling Eastern Filbert Blight
(2014) Tree hollow, cement it or drain it?

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Jay Pscheidt

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2701 SW Campus Way

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