Ability to Respond Total:12 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Rapid spread via high seed production.
4
Spread Amount
Throughout California except north and central Cascade Ranges, Modoc Plateau, Great Basin, and desert regions; to 1000 m.
3
Damage
Notes
Score
Ecological
Serious impacts to grasslands.
4
Agricultural
Not palatable to livestock. It forms dense thickets that cattle and horses stay out of and affects recreational use of open space areas (V. Guise).
5
Infrastructure
0
Cultural
Aesthetic impacts, affects rec. use of open space.
3
Health
0
Benefit
Notes
Score
Ecological
0
Agricultural
Unpalatable to wildlife and livestock.
0
Infrastructure
No apparent potential benefit.
0
Cultural
0
Health
0
Total
19
Ability to Respond
Ease of Response
Notes
Score
Detection
Detection occurs after establishment.
3
Control
Difficult to control once established. spreads via equipment along roads. Seed contaminant. Seed banks in heavily infested areas can be very difficult and last up to 15 years.
3
Tools in Place
Notes
Score
Entry
CDFA B listed.
2
Control
AS CDFA B listed weed, some control mandated at local level.
