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Invasive species

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Displaying 1 - 10 of 124 resources

Bristly hawksbeard ID guide

Bristly hawksbeard is a common weed in Western Oregon and Washington. The fast-growing annual bears bright yellow flowers. Stems have fine, soft hairs.

Renan N.D. Favera, Carol Mallory-Smith, Victor Hugo Vidal Ribeiro | Dec 2025 | OSU Extension Catalog Peer reviewed (Orange level)

Emerald ash borer in Oregon: what to do now — and what to plant next

Don’t remove healthy ash preemptively, learn the symptoms and start planning resilient replacements.

Kym Pokorny | Sep 23, 2025 | News story

Oregon State researchers develop forecast model for spotted lanternfly

The forecasts provide surveillance support, targeted control, and highlight regions at high risk of establishment.

Leonard Coop | Sep 2025 | Impact story

Invasive jumping worms disrupt Oregon soils and ecosystems

Jumping worms stay in the debris on top and eat two to three times the amount of leaf litter as the other worms.

Kym Pokorny, Chris Branam | Jul 24, 2025 | News story

OSU rangeland researchers help mitigate spread of invasive grasses

Communities in Eastern Oregon are better equipped to protect their rangelands from invasive grasses, reduce wildfire risk and restore the productivity and resilience of these vital ecosystems.

Vanessa Schroeder, Dustin Johnson | May 2025 | Impact story

How to get rid of tree-of-heaven: Solve Pest Problems

Tree-of-heaven is an invasive tree that spreads quickly and is difficult to control. It is a preferred food source for the invasive insect species spotted lanternfly. Learn how to identify and take action to control this aggressive weed.

Weston Miller, Jessica Green, J. Jeremiah Mann | May 2025 | Online resource

Spotted lanternfly resources

Spotted lanternfly (SLF) poses a threat to tree fruit and grape production. SLF has been reported as a serious pest in its invaded and home ranges.

May 2025 | Collection

Unconfirmed spotted lanternfly sighting prompts reminder for vigilance

Until a physical specimen is collected and confirmed, spotted lanternfly is not considered present in Oregon.

Kym Pokorny, Chris Branam | May 22, 2025 | News story

Oregon IPM Center leads the way to better pest management

The center’s strategies have been adopted by farmers and certification programs.

Silvia I. Rondon | May 2025 | Impact story

Extension central to strategic action to combat invasive annual grasses in Wallowa County

Through strategic planning, community collaboration and targeted resource use, the Wallowa County Invasive Annual Grasses Partnership is creating a lasting impact.

Peter Schreder | Apr 2025 | Impact story