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Managing Mile-a-minute Vine ( Persicaria perfoliata ) in North Carolina

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.

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Managing Mile-a-minute Vine ( Persicaria perfoliata ) in North Carolina

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  1. Managing Mile-a-minute Vine (Persicariaperfoliata) in North Carolina Rick Iverson NC Department of Agriculture & Consumer Services

  2. Discussion Points • Distribution • Summary of impacts • Identification features • Current actions

  3. Rockingham Co.

  4. New River Sites initially reported by D. Poindexter

  5. Infestation in Alleghany County

  6. Rockingham County Mile-a-minute vine location

  7. Origin – infested hay?

  8. 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

  9. 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

  10. Key Identification Features Triangular-shaped leaves Ocrea surrounding the stem Barbs on stem, petioles and leaf veins Iridescent, blue berries

  11. 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

  12. http://ag.udel.edu/enwc/research/biocontrol/mileaminute.htm Photos by Ellen Lake R. Latipes adult Adult feeding damage Larval node damage Eggs

  13. Observations MAM at weevil release sites was less robust than at untreated sites Smaller plants Signs of early senescence

  14. Observations Less fruiting at release sites compared to untreated areas

  15. 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

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