Lythrum salicaria Scorecard

Species:  Lythrum salicaria

Common Name:  purple loosestrife

Scorecard created on
Last Updated on

Results

Impact Total:14 / 35Impact = ( Spread + Damage - Benefit )

Ability to Respond Total:13 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:High

Confidence Notes:

Impact

SpreadNotesScore
Spread Raterapid reproduction, high seed set, clonal growth.4
Spread Amountcapable of invading many wetland types, including freshwater wet meadows, tidal and non-tidal marshes, river and stream banks, pond edges, reservoirs, and ditches.3
DamageNotesScore
EcologicalPotential to out compete native species.4
Agriculturalcompetes with more palatable plants.2
Infrastructure0
CulturalNegative impacts on recreation - streambanks, fishing and biodiversity. Illegal to sell in nurseries.3
Health0
BenefitNotesScore
Ecologicalmajor competitor of natives.0
Agricultural0
Infrastructure0
Culturalornamental1
Healthsome medicinal use.1
Total14

Ability to Respond

Ease of ResponseNotesScore
Detectiondetection occurs after establishment.3
Controldifficult to control once seed bank established, responds to herbicides and repeated manual removal.3
Tools in PlaceNotesScore
Entrythrough horticulture and accidental.2
Controlnoxious weed, some biocontrol in place. Control efforts in place by CDFA, WMA, county ag.3
OutreachOn CDFA and Cal-IPC lists.2
Total13

References

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