Ability to Respond Total:12 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Reproduces via seed & vegetatively. Has spread rapidly since introduction in 1930's. Mainly spreads by contaminated hay, soil, or vehicles, or by movement of seed and fragments in water.
4
Spread Amount
Invades wide range of ecotypes except deserts and elevations above 2200m.
5
Damage
Notes
Score
Ecological
Alters soil salinity, forms monocultures, excludes native species.
5
Agricultural
Invades irrigation ditches, croplands and rangelands.
3
Infrastructure
1
Cultural
0
Health
0
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
0
Cultural
0
Health
0
Total
18
Ability to Respond
Ease of Response
Notes
Score
Detection
Fairly easy to detect, particularly in flower. Seedling difficult to detect.
3
Control
Difficult to control with all methods, easy to spread root fragments.
2
Tools in Place
Notes
Score
Entry
CDFA B listed plant. Some barriers in place, but not many.
2
Control
Difficult to control large patches. Methods are available to control smaller patches using herbicides or combinations of techniques.
2
Outreach
Edutcation materials available on perennial pepperweed and more people are aware of its potential harm. On both CDFA and Cal-IPC lists.
