Ability to Respond Total:12 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Spreads vegetatively and sexually.
3
Spread Amount
Problem in fresh and brackish water throughout.
3
Damage
Notes
Score
Ecological
Potential to out compete native species. Rated high in the Cal-IPC inventory.
5
Agricultural
Interferes with irrigation.
3
Infrastructure
3
Cultural
Could impact shoreline fishing.
2
Health
Creates mosquito habitat.
2
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
Sewage outflow filtration.
2
Cultural
Aquatic ornamental.
1
Health
0
Total
18
Ability to Respond
Ease of Response
Notes
Score
Detection
Requires system wide surveys particular in areas of recreational fishing.
3
Control
Past eradication efforts suggest relatively ease of control if detected quickly prior to extensive spread. Responds to herbicides.
3
Tools in Place
Notes
Score
Entry
CDFA C listed plant.
2
Control
Mandated control at local level and by some Agencies, but not common. also some work by CDFA on biological control.
2
Outreach
On CDFA and Cal-IPC lists and included on Don't Plant a Pest Brochure. CA Dept of Boating & Waterways has had a very effective program in the Sac/SJ Delta (V. Guise).
