1. Topics
  2. Pests, weeds and diseases

Weeds

Photo Credit: Jamie Street - Unsplash.com (Cropped from original)

Browse resources

Displaying 11 - 20 of 131 resources

Is vinegar effective for killing weeds?

Q: What do you recommend for keeping weeds at bay in planting beds? We'd like to stop using Round-Up. Our beds are too big and the weeds are too numerous to be able to keep up mechanically. Would a vinegar solution be harmful to the soil?

A: View answer | View all featured questions

Symptoms of herbicide damage

This photo-based, searchable database offers users the ability to filter by plant, mode-of-action, symptoms, and more. It also provides great written summary information on 13 of the most commonly-used herbicide groups. Homeowners can select from over 100 crop or ornamental plants and see photos of herbicide damage to help diagnose if a plant problem might be due to herbicide use.

Kassim Al-Khatib | Aug 2023 | Online resource

Rattail Fescue: Biology and Management in Pacific Northwest Wheat Cropping Systems

Mitigating rattail fescue has become easier: this publication addresses this increasingly common weed in Pacific Northwest cropping systems.

Drew J. Lyon, Daniel A. Ball | Jul 2023 | Extension Catalog publication Peer reviewed (Orange level)

Which herbicides should I use on poison oak?

Q: I am dealing with poison oak growing in a stand of trees: Douglas firs, big-leaf maple saplings, and others. I have tried manual control and was unsuccessful. What would be the safest topical herbicide to apply to the leaves and stems while minimizing damage to the surrounding trees?

A: View answer | View all featured questions

Invasive Weeds in Forestland: Bull Thistle

Bull thistle is common in disturbed areas such as roadsides and logged forests. It invades a variety of habitats where it displaces native plants by outcompeting them for water, nutrients and space.

Stephen Fitzgerald | Apr 2023 | Extension Catalog publication Peer reviewed (Orange level)

Solve Pest and Weed Problems website gives gardeners solutions

The content – peer reviewed by the OSU Department of Horticulture – is presented in categories with information below each photo. Clicking on the photo takes users to another page that offers information about identification, ...

Signe Danler | Mar 2023 | Impact story

Methods to control blackberry thickets

With good timing and dedication, property owners can reduce a sprawling blackberry thicket to a few manageable stragglers

Kym Pokorny | Mar 14, 2023 | News story

How can I get rid of the moss on my pavement?

Q: The moss is growing really fast on my driveway with the recent winter weather. I need a method to remove the moss that can be used in the wet season and is pet safe.

A: View answer | View all featured questions

The Economic Impact of Pests and Pest Management on Oregon Sweet Cherries

A collection of real-world data show how insects, diseases, weeds and other pests affected the 2016 Oregon cherry crop. The aim is to raise yields and inform growers about the causes of crop losses.

Katie Murray, Isaac Sandlin, Peter Ellsworth, Paul Jepson, Al Fournier, Hang-Kwang Luh, Chris Hedstrom | Dec 2022 | Extension Catalog publication Peer reviewed (Orange level)

Pacific Poison-oak and Western Poison-ivy: Identification and Management

Discusses how to identify and control Pacific poison-oak and western poison-ivy, and how to prevent exposure to the plants' oily substance, urushiol, which can cause an allergic contact dermatitis.

Brooke Edmunds, Lauren Grand, Alicia Christiansen, Andy Hulting | Nov 2022 | Extension Catalog publication Peer reviewed (Orange level)