Weed Action Whangarei Heads

A community taking action to stop invasive weeds from taking over the incredible natural environment we all value. Join the fight, in your own backyard or in the bush, and protect what is uniquely ours!

  • Home
  • About
    • Weed Action Goals
    • Our Team & Partners
  • The Weeds!
    • Weed of the Month
    • The Dirtiest Dozen
    • Weeds A To Z
    • Herbicides and Additives
    • Control Methods
  • Take Action!
    • Weed Action Groups
    • Backyard Action
    • Get Advice/Get Gear
    • Donate to Weed Action
  • Resources
  • What’s New
  • Events
    • Calendar
    • Gallery
  • Contact
Back to Weed Search

Mexican Devil

Ageratina Adenophora - Image courtesy of Weedbusters

How to Control:

  1. Dig out or hand pull small infestations. Expose roots.
  2. Cut stems and treat with (5g metsulfuron-methyl /1L water)
  3.  Weed wipe all year round (330ml glyphosate/1L water) or (2g metsulfuron/1L water ).
  4. Spray, lightly, not to run off, (200ml glyphosate + 20ml penetrant/10L water) or (5g metsulfuron /10L water – add 10ml penetrant in winter). Best in Aug-Jan when in flower but before seeds present.
  5. Spray aquatic sites (200ml glyphosate/10L water).  Use glyphosate formulation approved for use over water.

Easiest to control at onset of flowering. Permanently exclude livestock and control vertebrate pests to minimise disturbance and  allow native species to provide competition for this weed. Slash or lightly spray to weaken population until native vegetation gets ahead. Interplanting with taller, shade-loving species can help in shady areas, but in open, moderately-lit sites, continuing control will be needed. In low-growing habitats, dense groundcover planting may be necessary. Minimise disturbance as seed bank reinfests bared areas.

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

For more information and pictures of this weed check out the Weedbusters info page. 

Quick Links

  • The Dirtiest Dozen
  • Free Community Resources
  • Guide to Herbicides
  • Control Techniques
  • Join a Weed Action Group!
  • Search for a Weed

What’s New

Bi Annual Newsletter January – June 2020

Want in on the Action?! Here’s what’s been happening in the world of weeds at the Heads… Supporting Landowners and Volunteers In January, another annual event was conducted for residents with the invasive ground cover Tradescantia fluminensis to collect their own population of bio-control beetles Neolema ogloblini aka ‘Shiny’ from our nursery site for translocation. […]

Weed of the Month

Weed Action Community Resources

Upcoming Events

  • Tamaterau Weed Action - January 20, 2021 @ 9:30 am - 12:30 pm

  • Taking Back Reotahi - January 24, 2021 @ 9:00 am - 11:30 am

  • Tamaterau Weed Action - January 27, 2021 @ 9:30 am - 12:30 pm

  • Tamaterau Weed Action - February 3, 2021 @ 9:30 am - 12:30 pm

Weed Action Groups

  • Tamaterau Weed Action
  • Headland Farmpark Weed Action
  • Wharf Rd Weed Action
  • Kohinui Catchment Landcare

View all Weed Action Groups

Quick Links

  • The Dirtiest Dozen
  • Weeds A-Z
  • Free Weed Control Resources
  • Guide to Herbicides
  • Events Calendar
    • Donate to Weed Action

Copyright © 2021 · Weed Action Whangarei Heads, Northland, New Zealand · Design by Creative Web Ideas · Log in