Myriophyllum spicatum Scorecard

Species:  Myriophyllum spicatum

Common Name:  Eurasian watermilfoil

Scorecard created on
Last Updated on

Results

Impact Total:21 / 35Impact = ( Spread + Damage - Benefit )

Ability to Respond Total:10 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:High

Confidence Notes:

Impact

SpreadNotesScore
Spread RateRapid spread in ponds and lakes via fragments. Hybridization with natives may be responsible for invasive genotype. Rated high in the Cal-IPC Inventory.4
Spread AmountPotential to spread in waterways throughout California.4
DamageNotesScore
EcologicalPotential to out compete native species, not paltable for fish. Rated high in the Cal-IPC Inventory.5
AgriculturalProblem in freshwater aquaculture.3
Infrastructure3
CulturalCould affect fishing. stems wrap around propellers causing engine failure.3
HealthNo apparent potential impact.0
BenefitNotesScore
Ecological0
Agricultural0
Infrastructure0
CulturalPopular pond and aquarium plant.1
Health0
Total21

Ability to Respond

Ease of ResponseNotesScore
DetectionDifficult to detect until established.2
ControlEradication difficult once established, mechanical removal spreads fragments.1
Tools in PlaceNotesScore
EntrySome restriction in place, but still found through other sources.3
ControlNo control currently mandated, some control efforts on local level.1
OutreachSome outreach in place. CDFA and Cal-IPC listed.3
Total10

References

No references yet.