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Weed & Pest Directory

Welcome to the Weed & Pest Directory

Seperator

On this page:

EDRR Species
Common Species
View All Species

You may also like:

Early Detection & Rapid Response
Integrated Pest Management
Back to Invasive Species Management
Knotweed flowers.

Knotweed flower.

Giant Hogweed Stem

Giant hogweed stem.

How to use this directory:

Identify weeds and pests by their photo, description, or search by agricultural, aquatic, forest, etc. Learn how these invasives affect the environment and economy and create a plan for treatment.

Download the Weeds Worksheet to Create a Treatment Plan
Tanwave
View All Species

Early Detection and Rapid Response Species (EDRR):

Seperator

These plant are our highest priority for treatment in Washington County. They are classified as EDRR because there is a chance to keep them at bay if they are actively treated. If you find any of these plants, we can treat them for you, free of charge.

Balfour's balsam flowers.

Balfour’s Balsam (Impatiens balfourii)

EDRR / Plant
Common snapping turtle.

Common Snapping Turtle (Chelydra serpentina)

Aquatic or Semiaquatic / EDRR / Reptile / Toxic
Diffuse knapweed infestation.

Diffuse knapweed (Centaurea diffusa)

Agricultural / EDRR
Emerald ash borer's red metallic abdomen and shine green wings.

Emerald Ash Borer (Agrilus Planipennis)

Agricultural / EDRR / Forest / Insect
False brome clumbs.

False Brome (Brachypodium sylvaticum)

EDRR / Forest / Plant / Toxic
Garlic Mustard

Garlic Mustard (Alliaria petiolata)

EDRR / Forest / Plant
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Seperator

Common Weed Species:

Seperator

These weeds can be found throughout Washington County. They are not considered “priority” and don't require “rapid response,” but should be responsibly removed to help ecosystems stay in balance.

Depending on the infestation, herbicide application may be an appropriate control. Tualatin SWCD does not endorse the use of specific herbicide brands or products.

Person holding bittersweet nightshade flowers

Bittersweet Nightshade (Solanum dulcamara)

Common / Forest / Plant / Toxic
Blackberry patch

Blackberry (Rubus species)

Agricultural / Common / Forest / Plant / Wildfire Risk
Bull thistle flowers

Bull Thistle (Cirsium vulgare)

Agricultural / Common / Plant
Purple flower spike of butterfly bush.

Butterfly Bush (Buddleia davidii)

Common / Plant
Common broom flowers

Common Broom (Cytisus scorparius)

Agricultural / Common / Forest / Plant / Toxic / Wildfire Risk
Common burdock.

Common Burdock (Arctium minus)

Agricultural / Common
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View All Species
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Tualatin Soil and Water
Conservation District
7175 NE Evergreen Pkwy #400
Hillsboro, OR. 97124

Phone: 503-334-2288
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