Extension Service Site Publications

• (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) 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
• (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.
• (2021) How to Do Regular Maintenance on Air Blast Sprayers to Ensure Proper Care for Specialty Crops Air blast sprayers are one of the most common sprayer types used in specialty crop production. These machines are designed for heavy use on farms, and like all machinery, require regular attention to function effectively. This publication highlights periodic maintenance tasks for air blast sprayers. This is a general maintenance guide meant to complement the manual that comes with many sprayers.
• (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 Wood shingles and shakes can provide years of service if properly installed and maintained. Learn what kinds of wood make the best roofing material; how to protect against fungus, moss and lichen; and how to clean your roof.
• (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 Sensor-controlled spray systems can help growers use fewer chemicals and less water while maintaining good pest control. Learn about the pros and cons of different types of sensor sprayers.
• (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! This concise publication gives useful information for homeowners, master gardeners, and professional landscapers about the boxwood blight disease: its symptoms, sanitation measures when it is discovered on a property, and preventive measures.
• (2015) Mummy Berry Management in the Pacific Northwest Mummy berry disease is prevalent throughout the Pacific Northwest, west of the Cascade Mountain Range, and affects the northern highbush blueberry industry. Growers often underestimate the potential damage of fungus-caused mummy berry. It may occur at low levels for many years and then, in one year of environmental conditions favorable to the fungus, increase greatly and cause dramatic annual yield losses. This publication briefly describes the mummy berry disease cycle and available management methods.
• (2021) 2022 PNW Plant Disease Management Handbook A comprehensive guide to plant disease management in the Pacific Northwest.
  Includes materials and tactics suitable for organic production and homeowner use as well as for commercial production. Covers testing services, common pathogens (such as nematodes, viruses, fungi and bacteria, as well as Phytophthora diseases), nonpathogenic phenomena (such as thatch, algae and lichens), and pesticides for disease control. Contains an alphabetical listing, by the host plant, of diseases, including their causes, symptoms, and recommended cultural and chemical controls.
  Fully indexed. Updated annually.
• (2013) Growing Hazelnuts in the Pacific Northwest: Integrated Pest Management This publication provides an overview of insect, disease, and vertebrate pest management in hazelnut.
• (2013) Scouting for Grape Powdery Mildew This publication provides vineyard owners with approaches for finding the first occurrence of grape powdery mildew. The publication covers tactics to manage powdery mildew, including use of fungicides and canopy management. It also discusses effective scouting techniques based on the key characteristics of the fungus.
• (2010) Bacterial Canker of Sweet Cherry in Oregon Bacterial canker is the number one killer of young sweet cherry trees in Oregon. This publication covers cause and symptoms, disease cycle, and disease management.
  Click the "view it now" button to view or download a print-friendly, page-size PDF (8.5 x 11 inches). Use the supplemental file link below to access a mobile-friendly (smaller page size) PDF.
• (2006) Sudden Oak Death and Phytophthora ramorum: A Guide for Forest Managers, Christmas Tree Growers, and Forest Tree Nursery Operators in Oregon and Washington Phytophthora ramorum (Sudden Oak Death) is a significant threat to forests and nurseries on the West Coast. This publication covers history of the disease pathogen, its distribution, and life cycle. Describes disease symptoms on forest trees and shrubs. Gives detection and eradication protocols, including quarantines. Tells how to prevent spread. References to other sources of information.
• (2023) 2023 Hazelnut Pest Management Guide for the Willamette Valley Learn how to control insects, weeds and disease during each stage of hazelnut growth.
  
  View the app version
  View diseases, pests and products by crop stage on a web-based app.
  Try the app
  
• (2023) 2023 Pest Management Guide for Tree Fruits: Hood River, The Dalles, White Salmon, Rogue Valley, Umatilla County This guide provides tree fruit growers with the latest information on pesticides and herbicides for fruit trees. People who grow apples, pears and cherries can learn application rates and recommendations for each stage of tree growth.
• (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.
• (2019) 2019 Pear Pest Management Guide for the Willamette Valley Recommends pest management practices for pear.
• (2023) 2023 Pest Management Guide for Apples: Willamette Valley Learn the latest recommendations for insect, mite and disease control in Willamette Valley apple orchards.
• (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.
  
  View the app version
  Sort and filter by crop stage, disease or pest on a web-based app.
  Try the app
  
• (2023) 2023 Pest Management Guide for Peaches Get the latest recommendations for insect, mite and disease control in peach orchards of the Willamette Valley.
• (2022) 2022 Willamette Valley Pest Management Guide for Walnuts Read the latest recommendations for insect, mite and disease control in walnut orchards.
• (2020) Managing Diseases and Insects in Home Orchards This pest management guide is for the home gardener. It recommends management practices for controlling diseases and insects in home orchards. It doesn't meet the exacting requirements of the commercial fruit grower.
• (2000) Controlling Diseases and Aphids on Your Roses Discusses the most common rose afflictions: black spot, rust, powdery mildew, and aphids. Identifies conditions that favor infection. Offers specific suggestions on how to control these afflictions, as well as a preventive guide to rose care, designed to avoid these problems altogether.
• (1999) Detecting and Controlling Eastern Filbert Blight This brochure summarizes the history of the spread of eastern filbert blight (Anisogramma anomala) from the eastern United States to the Pacific Northwest. Details its life cycle, and the symptoms and signs of infection from initial detection through death of tree branches. Explains how to differentiate between infections caused by eastern filbert blight and those caused by Eutypella cerviculata. Discusses which cultivars are most susceptible to infection and presents cultural and chemical methods of control.
• (2014) Tree hollow, cement it or drain it?