Pests, Plant Diseases, and Weeds

A guide to safe use and handling for applicators and dealers. Introduces and covers pests and pest control, federal and Washington State pesticide laws, pesticide formulations, pesticide label info ...

Washington State homeowners who plant apple, pear, or cherry trees on their property should know they are legally responsible for controlling insect pests because these pests are a threat to commercia ...

WCR, Diabrotica virgifera virgifera LeConte (Chrysomelidae), is currently a sporadic pest in the Pacific Northwest, but isolated infestations have been severe. The potential for WCR to become a ser ...

A field guide to use in identifying fruit root weevils in three different groups. Life Cycle & Monitoring along with weevil ID. ...

Jerusalem artichokes, or sunchokes, are gaining popularity among consumers and therefore being grown more widely. Both commercial growers and home gardeners should be aware of a major disease of Jerus ...

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Photographs and descriptions identify the white pine weevil, (Pissodes strobi), which is also known as the Sitka spruce weevil. Found throughout the western states, t ...

This publication is designed to educate wholesale buyers (for retail nursery outlets) on the quarantine rules in Washington regarding the import and distribution of grapevine material. ...

This publication reviews the wireworm literature and provides information on wireworm identification, biology, crop damage, monitoring, risk assessment, and nonchemical control options that can be int ...

Wireworms (Lumonius spp) can damage cereal grain crops, resulting in increased weed pressure and reduced stands, yields, and profits. Since crop damage is not detected until after planting, wireworm s ...

Current titles and prices of study materials to prepare for Washington State Department of Agriculture pesticide licensing examinations.

Cucurbits are high-value, specialty crops well-suited to western Washington—but under threat from Pseudomonas. Learn the symptoms and the management here.

This publication discusses the various HWSC systems and their potential suitability for PNW wheat production systems across rainfall regions.

AUTHORS: Drew Lyon, Michael Walsh, Judit Barroso, Joan Campbell

With a spiny fruit capable of injuring hooves, feet, and vehicle tires, growers from across the spectrum can learn to effectively manage this weed.

The invasive northern giant hornet (formerly known as the Asian giant hornet) poses a significant threat to honey bees, public health, and the environment: beekeepers and the public can learn more here.

Learn to manage herbicide-resistant weeds on your farm using the most effective methods, also known as best management practices (BMPs).

A well-managed pasture has several ecological and economic benefits. However, several species of arthropods (insects, mites and garden symphylans), and gastropods (slugs) inhabit pastures of the Pacific Northwest of the United States and can diminish those benefits.

Reviews Russian thistle biology as it relates to management, including seed dormancy and longevity in soil, seed distribution, seed germination and emergence, plant growth after establishment, crop competition, and resistance to herbicides. Outlines key considerations for managing for 3 crop years and 1 fallow year. Describes results from a residue management experiment designed to determine how to reduce tillage while maintaining winter wheat production.

Pigweed is an invasive plant pest usually found in disturbed areas, like farmland and along roadsides and fencelines. Because their aggressiveness can reduce crop yields, this PNW discusses how to prevent or curtail their spread in the region by learning how to identify them, their impacts, and the most effective control options (sanitation, mechanical, cultural, and herbicidal methods).

Bacterial canker is a real problem for sweet cherry growers, but you can learn to prevent and manage this disease by following the guidelines outlined here.

By using the photos, graphics, and information in this pub, you can learn to identify and monitor wireworms in your fields: control strategies are included.

Beekeepers in Washington State: learn the signs of northern giant hornet (NGH) damage, common look-alike damage, and how to report NGH to the state. (Formerly known as Asian giant hornet.)

Russian olive trees are fast-growing plants that since the 1950s have become invasive throughout many areas of the Inland Pacific Northwest, particularly in riparian ecosystems. They form impenetrable masses, create inferior wildlife habitat, and provide minimal forage value for big game and livestock. This publication helps landowners and land managers to control these woody invaders by providing a detailed botanical profile of the species and discussions of the latest regrowth research and weed-control methods and strategies. Supplemental materials, including a printable appendix, conveniently identify which native species are suitable as replacements (based on landscape type, size, and soil traits) and which herbicides and application techniques are the most effective for Russian olive control. Authors: Danielle Gunn, Ronald Patterson

In the Pacific Northwest (PNW), wild oat has become a notable weed pest of small grain and rotational crops, including pulse crops, potato, sugar beet, and oilseed crops. It has infested more than 3 million acres of cropland in Idaho, costing small grain growers in the state alone more than 9 million dollars annually in control costs. Feeding its spread is the fact that it has developed resistance to several herbicides. This PNW provides all the basics you need to mount a defense against the stubborn grass, including its identification, crop impacts, and management strategies. A handy table also lists the brand-name herbicides to which the wild oat has developed resistance, upping the odds on your control efforts. Authors: Albert T. Adjesiwor, Drew J. Lyon, Judit Barroso, Joan Campbell

Phytophthora species are water molds that can kill plants. They can spread undetected in container plants and equipment. Once they are introduced to an ecosystem, it's difficult or impossible to eradicate them. Nurseries can help prevent the spread of Phytophthora by following some simple steps. Learn how to protect native plants from sudden oak death and other Phytophthora species. By: Norma Kline, Marianne Elliott, Jennifer Parke, Dan Stark, Dave Shaw and Alicia Christiansen

In this Second Edition, we update pest management practices for established pests and provide new information on emerging pests and diseases. To produce high-quality wine and juice grapes, effective pest management is essential. The heart of the guide describes individual pests (insects/mites, diseases, nematodes, and weeds) and disorders, along with recommendations for their management.

This pub will walk you through how to correctly identify the diagnostic symptoms of sooty bark disease, a troubling, emerging pathogen spreading across Washington.

Pear psylla causes fruit russet and in large numbers can stunt and defoliate pear trees. Learn best monitoring practices as well as strategies to deploy when they are detected.

The emerald ash borer is an invasive, wood-boring beetle that causes nearly 100% mortality in infested ash trees: learn how to identify this pest and the latest management recommendations.

This publication is intended for Extension professionals, master gardeners, public agency personnel, tree care professionals, and those who are interested in an in-depth review of the current state of knowledge about EAB and the implications for potential damage and mitigation strategies in Washington State.

Currently, West Nile virus infects nearly 15% of mosquitoes in parts of Washington State, so effective mosquito control is increasingly important in irrigated orchards for keeping workers and animals safe. This publication breaks down multiple ways you can begin to get a handle on pesky mosquito populations.