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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:

Easily identify weeds and pests by their photo or description, or search by agricultural, aquatic, forest, etc. Learn how these invasives affect the environment and economy.

View All Species
Tanwave

Early Detection and Rapid Response Species (EDRR):

Seperator

These plant species 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 weeds, we can treat it for you, free of charge.

Balfour's balsam flowers.

Balfour’s Balsam (Impatiens balfourii)

EDRR / Plant
Drooping sedge leaves and seeds

Drooping Sedge (Carex pendula)

Aquatic or Semiaquatic / EDRR / Plant
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 / Weed of the Month
Garlic Mustard

Garlic Mustard (Alliaria petiolata)

EDRR / Forest / Plant
Giant butterbur

Giant Butterbur (Petasites japonicus)

EDRR / Plant / Toxic
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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 they should be responsibly removed just the same to prevent their spread, and to help ecosystems stay in balance.

Common teasel flowers

Common Teasel (Dipsacus fullonum)

Agricultural / Common / Forest / Plant
Creeping buttercup

Creeping Buttercup (Ranunculus repens)

Agricultural / Common / Forest / Toxic
Canada thistle flowers

Creeping Thistle (Cirsium arvense)

Agricultural / Common / Forest / Plant
English holly red berries

English Holly (Ilex aquifolium)

Common / Forest / Plant / Toxic
While flower of field bindweed

Field bindweed (Convolvulus arvensis)

Agricultural / Common / Forest / Plant
White hedge bindweed flowers.

Hedge Bindweed (Calystegia sepium)

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

Phone: 503-334-2288
Office Hours: 8:00am - 4:30pm
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