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!

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Herbicides and Additives

With all of the different brand names and formulations available, understanding which herbicides are which, and how strong they are can be confusing, The key is to look for the active ingredient which will be listed on the label. This tells you which herbicide it actually is and the concentration of that herbicide. You can then use this for comparing products.

The control methods given on this website mostly reference the generic herbicide name (for example “glyphosate”, which is the active ingredient in products that people often refer to as ‘Round Up’).  Occasionally the herbicide trade names (distinguished by ®) are given, usually where the product contains more than one active ingredient. The table below gives the herbicide name referenced in the control methods, and the strength of the active ingredient(s) in those herbicide. It also lists some examples of equivalent trade names of products can be substituted.

When it comes to using herbicides,  Weed Action recommends being trained in the safe handling and use of agrichemicals. Even if you have used chemicals for years, Growsafe courses are beneficial. Check out Grow Safe for more information or contact Weed Action.

HerbicideActive ingredientTradenames
Amitrole400g/L amitrole plus 100g/L ammonium thiocyanateEg. Activated Amitrole, (Product rates vary. Adjust quantities identified below based on active ingredient concentration)
Banvine®200g/L 2,4-D and 100g/L DicambaNote: Yates Woody Weedkiller is half the strength (100g/L 24D and 50g/L dicamba), so quantities identified below should be doubled.

Glyphosate360g/L glyphosateEg. Roundup Renew, Glyphosate 360
Haloxyfop100 g/litre haloxyfop-P-methylEg. Haloxyfop 100 (Agpro)
Note: Gallant Ultra is 5 x the strength (520 g/litre haloxyfop-P)
Metsulfuronmetsulfuron-methyl 600g/kgEg. Escort, Meturon, Mustang®
Triclopyr600 g/litre triclopyrEg. Grazon, Brushoff, Triclop 600
(many triclopyr products are 300g/litre strength, so quantities identified below may need to be doubled)
Tordon Brushkiller ®100g/L picloram 8g/L aminopyralid 300g/L triclopyr
Ie. Tordon Brushkiller XT
Picloram gel4.3% 43g/kg Picloram as the potassium saltCut n’ Paste picloram gel, Vigilant® gel
Penetrant
(additive, not herbicide)
Various - used to improve ability of herbicide to penetrate leaf cuticle or stomata, and increase rate and volume of herbicide uptake.Pulse®, Boost®, Freeway, Dewdrop
Crop oil
(additive, not herbicide)
Various - additive which improves spray wetting, reduces evaporation and increases herbicide uptake. Used with Haloxyfop.Uptake, C-Dax Oil®, Codacide Oil

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

To make it even easier to get started, these herbicides are available to Whangarei Heads residents through the Free Community Weed Action Resources.

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

Weed Action 2023 calendar

Can you believe it’s time to think of New Year’s resolutions and gifts already? How about adopting one hectare of local land and ensuring it’s weed free or gifting te […]

Weed Action Community Resources

Upcoming Events

Nothing from March 24, 2023 to April 11, 2023.

Weed Action Groups

  • Tamaterau Weed Action
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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

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