Weeds and Invasive Species

Research-based educational materials about Weeds and Invasive Species (Forestry) from the OSU Extension Catalog

EM 9380

Oregon Ash: Insects, Pathogens and Tree Health

Published January 2023

PNW 625

Weed and Vegetation Management Strategies in Christmas Trees

Published December 2017

EM 9171

Choosing the Right Service Provider for your Family Forest: Chemical Applicator

Published October 2017

EM 9040

A Guide to Riparian Tree and Shrub Planting in the Willamette Valley: Steps to Success

Published October 2011

EC 1595

Invasive Weeds in Forestland: English Ivy

Published September 2008

EC 1596

Invasive Weeds in Forestland: Knapweeds

Published September 2008

EC 1598

Invasive Weeds in Forestland: French, Portuguese, Scotch, and Spanish Broom

Published September 2008

EC 1591

Invasive Weeds in Forestland: Slender False-brome

Published September 2008

EC 1592

Invasive Weeds in Forestland: Garlic Mustard

Published September 2008

EC 1590

Invasive Weeds in Forestland: Canada Thistle

Published September 2008

EC 1594

Invasive Weeds in Forestland: Himalayan & Evergreen Blackberry

Published September 2008

EC 1599

Invasive Weeds in Forestland: Tansy Ragwort

Published September 2008

EC 1597

Invasive Weeds in Forestland: Knotweeds

Published September 2008

EC 1600

Invasive Weeds in Forestland: Yellow Starthistle

Published September 2008

EC 1593

Invasive Weeds in Forestland: Gorse

Published September 2008

EC 1589

Invasive Weeds in Forestland: Butterfly Bush

Published September 2008

EC 1588

Invasive Weeds in Forestland: Bull Thistle

Published September 2008

OSU Extension Catalog