Grazon Extra Herbicide (Aminopyralid, Triclopyr & Picloram)


Grazon Extra is the premium control option for foliar applications on hard-to-kill noxious and woody weeds. It contains three active ingredients, offering control of the broadest list of weeds in a single product on the market.

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Grazon Extra Herbicide

Active Ingredients: Aminopyralid @ 8 g/L, Picloram @ 100 g/L & Triclopyr @ 300 g/L

Grazon Extra Herbicide is the premium control option for foliar applications on hard-to-kill noxious and woody weeds. It contains three active ingredients, offering control of the broadest list of weeds in a single product on the market. Grazon Extra offers outstanding knockdown and residual weed control.

  • Grazon Extra is registered to control a range of environmental, noxious woody and herbaceous weeds.
  • Grazon Extra moves quickly to the tips of growing shoots and roots where the active ingredients disrupt plant growth. Exceptional results include rapid “brown-out”.
  • Grazon Extra is the premium option for foliar spraying of tough-to-kill woody weeds and many noxious herbaceous weeds.
  • The ingredients in Grazon Extra Herbicide remain active in the soil and prevent seeds of the target woody plants and secondary weeds from germinating for many months after application (in some cases up to two years).
  • Grazon Extra controls the target weeds without harming pasture grasses.
  • Grazon Extra Herbicide offers control of the broadest list of weeds in a single product on the market.

Major Weeds Controlled:

African boxthorn Horehound
Angophora spp. Lantana (Lantana camara) (Lantana montevidensis)
Australian blackthorn Lion’s tail (Leonatis nepetifolia)
Banksia spp. Limebush
Biddy bush Manuka
Blackberry Mesquite (Prosopis spp.)
Blue heliotrope Prosopis velutina
Brooms (Cape, English, flax leaf, montpellier) Milfoil (Yarrow)
Camphor Laurel Mistflower
Capeweed Mother-of-millions
Casuarina spp. Paddy’s lucerne
Chinee apple Parkinsonia
Cockspur thorn Paterson’s curse
Common sensitive plant Prickly pear (common) Smooth tree pear
Crofton weed Rubber vine
Eastern cotton bush (Maireana microphylla) Siam weed
Eucalyptus spp. Sicklepod
Fireweed Spear thistle
Galenia St John’s wort
Giant bramble Sweet briar
Gorse Tobacco weed
Groundsel bush (Baccharis halimifolia) Wattle (Acacia spp.) (except corkwood wattle)
Green cestrum Wild Rosemary (Cassinia laevis)
Hawthorn Wild tobacco tree

Pack Sizes: 1L, 5L & 20L

Registrant: Dow Agrosciences Australia Limited. (APVMA #:60830)

Tips For Use

Equipment Required for Application:

Depending on the Size of the Job at Hand:

  • Large dense infestations (for example, large, old dense blackberry stands) are best treated with a large motorised pump and handgun unit. This equipment can often be hired or a contract spray applicator can be engaged.
  • However, a suitable knapsack or hand pump spray unit will suffice in many situations, provided that good coverage can be achieved (to the point of run-off).
  • Ideally use a spray unit that is dedicated for application of herbicides only (to avoid cross contamination).
  • Measuring jug.
  • Cotton overalls or long-sleeved shirt and long pants.
  • Washable hat.
  • Elbow-length PVC gloves.
  • Safety glasses or face shield.

Correct Mixing Procedure:

  • If possible, mix Grazon Extra with clean water sourced from town supply or a rainwater tank, although any source of clean water may be used. Avoid using water that is particularly ‘hard’ or strongly alkaline as that may reduce herbicide efficacy. Half fill the spray tank with water then add the Grazon Extra before adding the remainder of the water. If the product label requires the addition of a spray oil, penetrant or wetting agent to assist in control your particular weed population, mix in once the spray tank is full.
  • Once mixed, the spray solution should ideally be kept agitated and used immediately. However, if circumstances conspire to interrupt spraying, a mixture of Grazon Extra and water can be stored for up to seven days, provided that it is intermittently agitated each day, and well agitated again before use.

Application Timing for Best Results:

  • In general, smaller weeds are easier to control than large ones.
  • Grazon Extra is most effective when applied to weeds that are not stressed due to lack of moisture, excessive heat, insect or pathogen (such as rust) damage, etc. and are actively growing. Actively growing weeds will draw the chemical into the vascular system and transport it through the stems and down to the roots to ensure maximum efficacy.
  • Grazon Extra needs to penetrate into the leaves of treated weeds before any rainfall occurs so do not make applications if rain is possible before the spray is completely dry – usually one hour. Similarly, avoid application if the leaves are wet from rainfall or dew.
  • Once the weeds have been sprayed leave them undisturbed so that the chemical is able to move throughout the leaves, stems and roots and provide complete kill. Disturbing the weeds by slashing, burning, mulching, etc. before the chemical is fully distributed will compromise the control achieved. We recommend that blackberries and other woody weeds not be disturbed for six months after spraying to maximise the performance of Grazon Extra.

Woody Weeds – Getting started with Grazon Extra herbicide

To learn more about Corteva or to view all products available in their range click here.

Additional information

Weight N/A

1 Litre, 5 Litre


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