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Weeds

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Displaying 1 - 10 of 109 resources

Dandelions: Living with, or without, them

Bright yellow dandelions (Taraxacum officinale) are a common sight in lawns and gardens across Oregon, mostly in undisturbed areas. Whether you love them or want to get rid of them, it helps to know more about dandelions—how they grow, what good they can do, and how to manage them if needed.

LeAnn Locher, Srijana Shrestha | Apr 2025 | OSU Extension Catalog Peer reviewed (Gray level)

Workshops boosts weed control efforts in Eastern Oregon

Attendees helped strengthen the agriculture and natural resources workforce in northeast Oregon, filling critical gaps in weed management capacity.

Will Price | Mar 2025 | Impact story

How do I get rid of crabgrass?

Q: I’m having a problem with crabgrass on my lawn. How do I get rid of it?

A: View answer | View all featured questions

Solve Pest Problems website gives gardeners solutions

Solve Pest Problems provides Oregon gardeners with easy access to research-based solutions for common pest and disease issues, helping them manage their gardens more effectively and safely.

Signe Danler | Feb 2025 | Impact story

How to remove poison oak plants and treat a rash

Poison oak plants contain a chemical that causes a severe rash. Learn how to spot a plant, safely remove, and clean your clothes, gear and skin afterward to prevent a rash.

Lauren Grand | Jan 2025 | OSU Extension Catalog Peer reviewed (Gray level)

Identifying herbicide injury in blueberries: A grower’s guide

Herbicide use sometimes leads to crop injury. However, herbicide injury symptoms overlap with other stressors, making it hard to find the cause. Learn how to identify herbicide injuries and prevent problems.

Marcelo Moretti, Linda Brewer | Jan 2025 | OSU Extension Catalog Peer reviewed (Orange level)

Common weeds found in Central Oregon in landscapes and lawns

These are weeds commonly seen in Central Oregon.

Amy Jo Detweiler | Apr 2025 | Educational gallery Peer reviewed (Gray level)

Weed competition and the critical weed-free period in hemp

For hemp growers, controlling weeds is crucial to producing a successful crop. Keeping a field weed-free for a certain period while plants are establishing is important for bud yield.

Matthew Cutulle, Govinda Shrestha | Aug 2024 | OSU Extension Catalog Peer reviewed (Gray level)

What is this weed that has overtaken my pasture?

Q: This weed has overtaken my horse pasture in large amounts this year. I’m trying to identify it and I’ve come up with two possibilities but I’m not sure which one it is. Possibly hedge mustard or creeping yellowcress? ...

A: View answer | View all featured questions

Managing Hypochaeris Radicata may prevent Stringhalt Disease in horses

A debilitating condition in horses called stringhalt may be associated with Hypochaeris radicata, also known as false dandelion, flatweed, common catsear or summer dandelion. This invasive species is common in pastures throughout Oregon.

Melissa Fery | Jun 2024 | OSU Extension Catalog Peer reviewed (Gray level)