Hydrilla verticillata Scorecard

Species:  Hydrilla verticillata

Common Name:  hydrilla

Scorecard created on
Last Updated on

Results

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

Ability to Respond Total:16 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:High

Confidence Notes:

Impact

SpreadNotesScore
Spread RateRapid spread in waterways. Vegetative reproduction primarily.4
Spread AmountAlready a serious problem in freshwater habitats, potential to get worse.4
DamageNotesScore
EcologicalPotential to out compete native species, impedes migration of anadromous fish. Rated high in the Cal-IPC Inventory5
AgriculturalImpact to commerical fisheries.2
Infrastructure3
CulturalImpact to sport fishing.3
HealthPprovides good mosquito habitat.2
BenefitNotesScore
Ecological0
Agricultural0
Infrastructure0
CulturalPopular aquarium plant.1
HealthUsed as health supplement.1
Total21

Ability to Respond

Ease of ResponseNotesScore
DetectionDifficult to detect until established.2
ControlEradication difficult once established. Vegetative fragments are dispersed by mechanical removal.1
Tools in PlaceNotesScore
EntryQuarantine.4
ControlNoxious weed.5
OutreachSome outreach in place.4
Total16

References

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