Download Rick Iverson - Managing Mile-a-Minute Vine (Persicaria perfoliata)

Managing Mile-a-minute Vine
(Persicaria perfoliata)
in North Carolina
Rick Iverson
NC Department of Agriculture
& Consumer Services
Discussion Points
• Distribution
• Summary of impacts
• Identification features
• Current actions
Rockingham Co.
New River
Sites initially reported by D. Poindexter
Infestation in Alleghany County
Rockingham County Mile-a-minute vine location
Origin –
infested hay?
Why the concern?
• Listed as a NC Class B Noxious Weed
• This is the first documented naturalized
population in NC by Derick Poindexter
(Phytoneuron 2010 – 30:1-9)
• First noticed in NC in 2000 as contaminant
of potted hosta plants in Wake County
Potential Impacts
• Displace native veg.
•
•
•
by quickly smothering
other plants
Rapid growth rate
Seed dispersal by
animals
Seed can float for up
to 7 days
Key Identification Features
Triangular-shaped leaves
Barbs on stem, petioles and leaf veins
Ocrea surrounding the stem
Iridescent, blue berries
Proposed Actions by NCDA&CS
• Regulate as Class B Noxious Weed
• Quarantine the infested area of Alleghany
County
• Work with NC DOT to control infested
areas along roadsides
• Release biocontrol weevil: Rhinoncomimus
latipes
http://ag.udel.edu/enwc/research/biocontrol/mileaminute.htm
Photos by Ellen Lake
R. Latipes adult
Adult feeding damage
Eggs
Larval node
damage
Observations
Smaller plants
Signs of early
senescence
MAM at weevil release sites
was less robust than at
untreated sites
Observations
Less fruiting at release
sites compared to
untreated areas
Use of Herbicides
• Control early in season before flowering –
seed viable for 5 years
• Pre-emergent herbicides
– Pendimethalin, sulfometuron, imazapic
• Foliar herbicides
– Non-selective – glyphosate
– Selective - triclopyr