CLASS 1A WEEDS
CLASS 1B WEEDS
Blueweed (Vipers bugloss)
Common St. Johnswort
CLASS 2 WEEDS
CLASS 3 WEEDS
Perennial sorghum ssp. (Johnsongrass)
Phragmites (Common reed)
CLASS 4 WEEDS
Cogongrass (Japanese blood grass)
Dyer's woad may be a winter annual, biennial, or a short-lived perennial. Heights of one to four feet are common. A thick tap root may penetrate to five feet deep.
Leaves are blue-green with a whitish midrib.
Dyer's woad was introduced from Europe for production of textile dyes. It thrives in waste areas, gravel pits, road sides, pastures, field edges, and disturbed soils.
The bright yellow flowers bloom and are highly visible in late spring.
Club shaped seed pods each produce a single seed. As the fruits mature they turn from green to dark brown or nearly black.
|Biocontrol - Rust
Rust infected plants have a curley puckered look and are usually smaller than surrounding woad plants. Rust is located under the leaf surface and appears as small reddish-brown spots.