Cirsium arvense Scorecard

Species:  Cirsium arvense

Common Name:  Canada thistle

Scorecard created on
Last Updated on

Results

Impact Total:20 / 35Impact = ( Spread + Damage - Benefit )

Ability to Respond Total:11 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:High

Confidence Notes:

Impact

SpreadNotesScore
Spread RateRapid reproduction, high seed set, clonal spread.4
Spread AmountNear complete spread already.4
DamageNotesScore
EcologicalPotential to out compete native species.4
AgriculturalProblem for grazing.4
Infrastructure2
CulturalImpacts recreational use of grasslands.2
Health0
BenefitNotesScore
EcologicalMajor competitor of natives.0
Agricultural0
InfrastructureNo apparent potential benefit.0
CulturalVery minor food source.0
HealthRoots and leaves are edible.0
Total20

Ability to Respond

Ease of ResponseNotesScore
DetectionDetection occurs after establishment.3
ControlDifficult to control once seed bank established.1
Tools in PlaceNotesScore
EntryCDFA B listed.2
ControlControl can be madnated at local level.3
OutreachBoth CDFA and Cal-IPC listed.2
Total11

References

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