Ability to Respond Total:12 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Appears to be spreading in northern California, but not at rapid rate.
3
Spread Amount
Disturbed and undisturbed sites, roadsides, railroad rights-of-ways, fields, pastures, grain and alfalfa fields, forest and rangeland. Often grows on dry, rocky or sandy soils but primarily in the northern part of the state.
0
Damage
Notes
Score
Ecological
Dyer's woad is highly competitive and can grow in large, dense colonies that displace desirable rangeland species, crop plants, and the native vegetation of an area.
3
Agricultural
Only a minor agricultural weed compared to non-crop areas.
1
Infrastructure
0
Cultural
0
Health
0
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
0
Cultural
Was used as a dye plant and probably still is in some areas, but only of minor importance.
1
Health
0
Total
6
Ability to Respond
Ease of Response
Notes
Score
Detection
Bright yellow flowers make it easy to detect, but it can be in some fairly remote areas.
4
Control
As a perennial, it is difficult to achieve excellent control, even with an herbicide. Very difficult using mechanical or cultural techniques.
3
Tools in Place
Notes
Score
Entry
CDFA B listed noxious weed.
1
Control
Control done at local level by Weed Management Areas or though CDFA B listing status.
