Myriophyllum aquaticum Scorecard

Species:  Myriophyllum aquaticum

Common Name:  parrotfeather

Scorecard created on
Last Updated on

Results

Impact Total:18 / 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. Sexual reproduction limited.4
Spread Amountpotential to spread in waterways throughout California.4
DamageNotesScore
EcologicalPotential to out compete native species, not paltable for fish.4
Agriculturalproblem in freshwater aquaculture.3
Infrastructure3
Culturalcould effect fishing.1
Health0
BenefitNotesScore
Ecological0
Agricultural0
Infrastructure0
Culturalpopular pond and aquarium plant.1
Health0
Total18

Ability to Respond

Ease of ResponseNotesScore
Detectiondifficult to detect until established.2
Controleradication difficult once established, mechanical removal spreads fragments.1
Tools in PlaceNotesScore
EntryCDFA B listed so some mandates to prevent sales in place, although still sold in landscape nursery industry.3
ControlControl activity at local level as this is a CDFA B listed plant.2
OutreachOn both CDFA and Cal-IPC lists.2
Total10

References

No references yet.