Weed, Poisonous Plant, and Pest Resources for Small Farms

Weed Management and Control

2019 PNW Weed Management Handbook

A comprehensive guide to weed management in the Pacific Northwest. Covers biological weed control agents, pesticide safety and disposal, agrichemicals and their properties, and control of problem weeds. Contains sections on weed control in cereal grain crops; grass seed crops; forage and seed crops;...

By Ed Peachey | OSU Extension Catalog

Managing Summer Weeds in Pastures

This article describes the various weeds found in pastures during the summer months. The article also explains how to keep these weeds at bay and prevent them from coming back the next year.

By Melissa Fery, | Article

Foxtail Control in Pastures and Hayground

Foxtail is a problematic grass in pastures and hayground, and infestations need immediate attention. Small infestations of foxtail should be spot treated, while larger infestations require whole pasture renovation. This informational paper describes proper foxtail management and control in a forage setting.

By Shelby Filley, | Article

Management Guides for Common Pasture Weeds

Integrated Management of Downy Brome in Winter Wheat

Downy brome (Bromus tectorum L.), also known as cheatgrass, is especially troublesome in low precipitation production areas where crop rotations are mostly limited to winter wheat followed by a year of summer fallow. The invasive weed is best controlled with a combination of management tools to...

By Andy Hulting | OSU Extension Catalog

Field Bindweed

Field bindweed is one of the most common noxious weeds in the Pacific Northwest and one of the most difficult to control. Crop yields often are reduced 50 percent or more where field bindweed infestations are dense. It has a deep root system that competes with crop plants for water and soil...

OSU Extension Catalog

Wild Carrot

An abundant seed producer, this weed grows in meadows, pastures, along roadsides, and in noncrop areas. Also known as Queen Anne's lace, wild carrot is listed as a Class B noxious weed in Washington. Counties in the Columbia Basin which grow carrot seed require its control. A problem in hay fields...

OSU Extension Catalog

Yellow Starthistle: Ecology and Management on Pacific Northwest Rangelands

Covers the history of yellow starthistle (Centaurea solstitialis L.) invasion of the Pacific Northwest and describes current infestation levels in Oregon and Washington. Provides basic information regarding yellow starthistle ecology, including descriptions of habitat, seed production, seed...

OSU Extension Catalog

Poisonous Plants

Poisonous Plants Commonly Found in Pastures

Pastures often contain weeds that are potentially dangerous to livestock. The toxic compounds in plants are usually a defense mechanism against predation and have a distinct, unpleasant odor or a bitter taste and are not preferentially grazed. Consumption of unpalatable plants will increase under some circumstances, primarily if other forage is not available. Understanding the dangers and various management strategies to control toxic plants will reduce the risk to your livestock.

By Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff, | Collection

Western Washington Poisonous Plants

This document lists Western Washington plants that have been known to be poisonous to horses.


Other Pests that Affect Pastures

What’s That Moss Doing In My Pasture?

It's that time of year when we notice, in some cases, more moss than grass growing in our pastures. What went wrong? How can the problem be fixed? Most folks want to know what they can do to get rid...

By Melissa Fery, | Article

Armyworms in Grass Pastures and Corn in Western Oregon

Discusses identification, life cycle, monitoring, action thresholds, biological control, organic controls, and chemical controls. Includes color photos for identification.

OSU Extension Catalog

A Burrowing Pest: Controlling Gophers on Your Small Acreages

Gophers are useful animals in the wild as they aerate the soil, eat insects and mix surface soil layers, but they are a nuisance on the farm when conflict surfaces between the farmer and the gopher...

By Melissa Matthewson, | Article

Endophyte Toxins in Grass and Other Feed Sources: Risks to Livestock

Many varieties of tall fescue and perennial ryegrass are infected with a fungal endophyte. Endophytes produce bioactive compounds that, while beneficial to the host plants, can be toxic to livestock that consume them. This publication explains what an endophyte is, describes livestock health...

By Gene Pirelli, Nicole Anderson | OSU Extension Catalog

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