Please contact our Customer Centre for pricing information 0800 100 123

Product Description

​A clear, dark amber to purple liquid

Why Use Maize Guard®

  • ​For pre-emergence grass and broadleaf weed control in maize & sweetcorn.
  • An essential part of any maize planting programme.
  • Tank mix with Atratec, Atraflo or Terbaflo to increase the weed spectrum.


​Acetochlor 840g/L

Chemical group  Acetanilide

Mode of action: Group 15

Regulatory Information

  • Registered pursuant to the ACVM Act 1997, No P7158
  • EPA approval No HSR000404
  • Agrecovery

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To order this product contact the customer centre and place your order.

0800 100 123


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Product Sizes available

  • 20 L
  • 200 L
  • 1000 L

Delivery Options

  • Freight to farm
  • Ravensdown pickup point

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Important Information


    ​For pre-emergence weed control in maize and sweetcorn crops

    An essential part of any maize planting programme

    Use in combination with Atratec to increase the weed spectrum

    Early removal of emerging weeds is critical to achieving high maize yields. Maize Guard has robust activity across a range of soil types including peat, sands and clays and is also more active than other compounds in dry conditions. Organic soils and low soil moisture do reduce activity.

    Apply immediately after planting for best results, late application can result in lower levels of weed control.

    Use 3 litres of Maize Guard per hectare in 200 - 300 litres of water, ensuring even coverage of soil surface. Tank mix with Atratec herbicide and / or Halexcs or Toppel 500 insecticide.

    Surface applied applications of Maize Guard will work under dry soil conditions, but soil moisture will improve activity. A fine firm seedbed will improve weed control. Maize Guard can be applied and incorporated pre-planting. This can be done by performing normal seedbed preparation to achieve a seedbed free of plant residues and clods. Then surface apply Maize Guard and follow with a tined cultivator, incorporating to a maximum depth of 5cm. Maize can then be planted.

    Always refer to the label for application rate details


    Applied following planting and before crop and weed emergence. It is absorbed mainly through the shoots of the germinating grass weeds and the roots of germinating broadleaf weeds, where it interferes with protein formation and plant growth.


    • Ezi-Action Drum Pumps available for 200L containers.
    • Dispensing spout attached to IBC.
    • 40 x 20Lt per pallet
    • 4 x 200L per pallet

    • Keep out of reach of children.
    • Store in accordance with NZS 8409 Management of Agrichemicals.
    • Store in original container tightly closed in a locked, dry, cool, well ventilated area away from foodstuffs, fertilizers and seeds.

    Please refer to the product label for product handling and storage details


    When stored appropriately this product should show no significant degradation for two years from the date of manufacture. Please contact your Ravensdown Account Manager, or the Customer Centre on 0800 100 123, for further information about the use of any product that is older than this.


    Ravensdown Atratec may be added to the tank mix to improve the spectrum of activity. Alternatively Atratec or Dicam 480 may be applied as a follow-up post emergence treatment where high populations of fathen and willow weed exist.