Ability to Respond Total:7 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Moderate rate of spread. First detected in CA in 1920's in San Francisco, currently found in 7 counties, mostly in northern and central California. Likely limited to more mesic coastal areas.
2
Spread Amount
Locally populations can form dense stands most often near the coast and in coastal dunes. Coastal dunes tend to be high value for conservation and protection, but also high development pressure.
3
Damage
Notes
Score
Ecological
In coastal sand dunes can form small but dense stands where it grows. Likely to reduce habitat for flora and fauna that rely on coastal sand dunes in California. It is likely the seed is long lived. Many sensitive species grow in dune habitat.
4
Agricultural
0
Infrastructure
0
Cultural
0
Health
Many Senecio species are toxic
1
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
0
Cultural
0
Health
0
Total
10
Ability to Respond
Ease of Response
Notes
Score
Detection
Somewhat low growing and inconspicuous plant growing in dune habitat. Difficult to detect except when in flower, and purple flowers ease detection.
3
Control
Sources suggest herbicides can be effective, hand pulled plants should be bagged if in flower, seeds appear to also grow in disturbed areas. Seeds may be long-lived making local control difficult.
