Weed Control
Home ⟩ Noxious Weeds ⟩ Orange and Yellow Flowering Plants ⟩ Dyers Woad
Dyers Woad
Information | Images
Isatis tinctoria
Winter annual, biennial, or short-lived perennial
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Identification and management tips
- Dyers woad has bright yellow flowers with four petals.
- Leaves are bluish green with a prominent white mid rib.
- One of the simplest and most effective method of control is hand pulling.
- Plants must be bagged if no flowers are present and seedpods have formed.
Most effective control methods and timing
| March | April | May | June | July | Aug | Sept | Oct |
|---|---|---|---|---|---|---|---|
|
Prev Chem |
Prev Chem Mech |
Mech |
Mech |
Prev |
Prev |
Prev |
Prevention (Prev) Monitor and destroy new plants before seed production.
Mechanical (Mech) Hand pulling, digging, cutting, mowing and tilling.
Cultural (Cult) Biological control agents, livestock grazing, and revegetation practices.
Chemical (Chem) Selective herbicides based on the plant and the specific location. Check our weed fact sheets for specific control information.
Links
Photo credits
Left to right:
- Steve Dewey, USU (first 3); Weber County Weed Abatement