Weed, Poisonous Plant, and Pest Resources for Small Farms

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These publications are shared to teach farmers and agriculturalists how to properly control weeds and poisonous plants and pests. Handbooks and management fact-sheets are provided as well as a list of common pasture weeds, poisonous plants, and other pests that affect pastures.

Weed Management and Control

Don't wait to make a weed management plan

Pesky weeds often go undetected in pastures until summertime when they’re in full bloom. And by that time, the best that can be done is to limit the spread of seed and then prepare a management strategy for next season.

Melissa Fery | Mar 2007 | 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 ...

Shelby Filley | Jul 2022 | Article

Management Guides for Common Pasture Weeds

Catchweed Bedstraw (in English)

This section contains information on identification of the different life stages of Catchweed Bedstraw.

Mar 2018 | Online resource

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 ...

Drew J. Lyon, Andy Hulting, Don W. Morishita, Frank Young | Aug 2020 | Extension Catalog publication

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 ...

Jim P. Fitzsimmons, Larry C. Burrill, Jed B. Colquhoun | Jun 2020 | Extension Catalog publication

Western Bracken Fern (in English)

This article describes the various problems caused in livestock by the Western Bracken Fern in the Pacific North West.

Sep 2017 | Online resource

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 ...

Larry L. Larson, Roger Sheley, Michael McInnis, Gary Kiemnec | Jan 2008 | Extension Catalog publication

Poisonous Plants

Plants Poisonous to Livestock (in English)

Table of poisonous plants and the species it affects, including the scientific name, common name, poisonous parts of the plant, and the primary poisons.

Mar 2018 | Online resource

Plants Poisonous to Livestock in the Western States (in English)

Poisonous plants are a major cause of economic loss to the livestock industry. Each year these plants adversely affect 3 to 5 percent of the cattle, sheep, goats, and horses that graze western ranges. All too often the losses to individual livestock operations are large enough to threaten the viability of that ranch.

Apr 2011 | Online resource

Other Pests that Affect Pastures

What’s that moss doing in my pasture?

When moss grows in pastures, it's usually a sign of a deeper problem. Permanently getting rid of moss requires addressing the underlying problem, whether that's the condition of the soil or too much shade.

Melissa Fery | Mar 2007 | 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.

Amy Peters, Glenn Fisher | Nov 2006 | Extension Catalog publication

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 ...

Gene Pirelli, Nicole Anderson, A. Morrie Craig, Carolyn A. Young | Nov 2016 | Extension Catalog publication

May 2017

Want to learn more about this topic? Explore more resources from OSU Extension: Pasture and forages, Weeds

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Controlling perennial bindweed takes persistence

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Weeds in Pastures and Hayground Collection

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Forages - hay and pasture collection

This collection has information on soil testing and ferilizing, renovation. forage management , hay, irrigation, feeding values, forage types, forage anti-quality factors, leasing pastures and more.

Shelby Filley | Aug 2019 | Collection

Nutritional value of pasture forages changes through the growing season

Assess the nutritional value of forages in pasture and hayground.

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Nitrate toxicity in beef cattle

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When should I burn poison oak?

We have several acres of land out near Elmira, Oregon and within that area there was a substantial amount of established poison oak when we purchased the property. I have been digging it out, including the roots, as much ...

Pat Patterson | Nov 2016 | Featured question

How to determine pasture rental rates

You can determine rental rates for pasturing cattle and sheep by using the average cost in an area and then factoring in variables such as animal size, pasture quality, work done by each party and lease length.

Shelby Filley | Aug 2018 | Article

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