Ability to Respond Total:9 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:Medium
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Populations remain stable but also are not spreading rapidly.
2
Spread Amount
Associated with coastal dunes and coastal prairie, moist grasslands, roadsides and other disturbed areas, and was recently found in pastures in the central Sierra Nevada foothills. Unlikely to become a widespread weed on annual rangelands.
2
Damage
Notes
Score
Ecological
Parentucellia viscosa is a hemiparasitic annual, but can germinate and grow without hosts.
1
Agricultural
May grow on rangeland, but unlikely to grow with large coverage except in costal prairie.
1
Infrastructure
0
Cultural
0
Health
0
Benefit
Notes
Score
Ecological
May be a nectar source for native pollinators, however, there is no evidence for this in the literature.
0
Agricultural
Unlikely to be a desirable forage due to its glandular nature, but there is no literature on this.
0
Infrastructure
0
Cultural
0
Health
0
Total
6
Ability to Respond
Ease of Response
Notes
Score
Detection
Parentucellia viscosa is fairly easy to identify for someone with minimal training. Plant is dispersed in known ways.
4
Control
Few resources exist on control methods. One study showed that retreatment was required after 2 years of mechanical removal. Limited information of chemical treatments.
3
Tools in Place
Notes
Score
Entry
Not listed on CCR 4500 Noxious Weed list.
0
Control
Local control efforts exist in certain locations within the state, particularly in coastal dune environments.
