Pests, Plant Diseases, and Weeds

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.

Widespread herbicide resistance in Italian ryegrass makes integrated weed management strategies difficult for this problematic weed. Learn about the multiple control methods that can be combined in various ways for wheat-based cropping systems for better long-term control.

Historically considered a minor honey bee pest in Washington, current and future climate models indicate regions here of increasingly suitable habitat for small hive beetle. This pub provides information for Washington beekeepers to detect, accurately identify, monitor, treat, and report sightings.