Lynn Ketchum

Featured Resources

Latest Resources

Basic Weed Science and Management

Weed biology and ecology, functional groups of weeds, and introduction to weed control strategies

By Pami Monnette, Chris Cornwell | Presentation

Managing Weeds

Weed identification, prevention, and management.

By Pami Monnette, | Presentation

Leaf Identification Key

Guide to identifying plants by leaf shape, margin, and venation.

Educational Document

Latest News

Roll up your sleeves: Invasive weeds need persistence to control

Feb 23, 2018
Invasive weeds enter backyards in multiple ways and once there can cause havoc.

By Kym Pokorny | News Story

How to manage three common weeds in the vegetable garden

Jul 26, 2013
Knowing more about weeds can give gardeners a leg up in the fight, said Ed Peachey, weed specialist for the Oregon State University Extension Service.

News Story

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Have a Question? Ask an Expert!

Ask an Expert is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.

Ask Us a Question

Is Crossbow a good choice for killing wild blackberries?

I can find lots of information on what Crossbow kills but no specific information on how it does it. I am trying to kill wild blackberries. My yard is in a condo development and is right next to my neighbor who does not like herbicides. She tells me that if I spray the blackberries that are next to...

By Kaci Buhl, | Featured Question