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Atlantis OD

Atlantis OD provides post-emergence control of a wide range of grass weeds and broad-leaved weeds in winter wheat crops including black-grass, wild oats rye-grass, chickweed and mayweed. The oil dispersion (OD) formulation maximises the activity of mesosulfuron and iodosulfuron providing good control even when weeds have metabolic resistance.

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What is Emerger?

A pre-emergence herbicide for the control of annual broad-leaved weeds in potatoes.

Product Profile

Active substance

600 g/L aclonifen


Suspension Concentrate (SC)

Pack Size

10 L

Water Volume

200–400 L/ha

Buffer Zone

DRT – see below



Important Information



Maximum individual dose

1.75 L product/ha

Maximum number of treatments

1 per crop

Latest time of application

Before crop emergence

Aquatic buffer zone distance

6 metres

Other specific restrictions

This product must not be applied via hand-held equipment

Aquatic buffer zone

To protect aquatic organisms, respect an unsprayed buffer zone to surface water bodies as specified for the crop.

Horizontal boom sprayers must be fitted with three star drift reduction technology. Low drift spraying equipment must be operated according to the specific conditions stated in the official three star rating for that equipment as published on HSE Chemicals Regulation Division’s website. Maintain three star operating conditions until 30 m from the top of the bank of any surface water bodies.

Do not allow direct spray from horizontal boom sprayers to fall within the distance specified for the crop to the top of the bank of a static or flowing water body, or within 1 m of the top of a ditch which is dry at the time of application. Aim spray away from water.

Buffer zones of more than 5 m cannot be reduced under the Local Environment Risk Assessment for Pesticides (LERAP) scheme.



Why you need Emerger

  • Emerger is a bleacher with a novel mode of action
  • Consistent performer for pre-emergence weed control
  • Effective against a wide range of annual weeds
  • Activity against grass and broad-leaved weeds
  • Emerger will be a key herbicide for the potato crop

When and how to apply

Weeds controlled

Emerger is absorbed primarily through the shoot of emerging seedlings as they grow through the layer of herbicide applied pre-emergence to the soil surface. Susceptible weeds can emerge, but these will become chlorotic, their growth will be retarded leading ultimately to death.

After pre-emergence application do not disrupt the herbicide layer. Any form of mechanical cultivation or disruption of the soil surface by any other method will reduce the level of weed control provided.


The following annual weeds will be controlled by a pre-emergence application of Emerger at 1.75 L/ha:

Pansy, field

Moderately susceptible

Bindweed, black

Moderately resistant






Moderately susceptible

Trials have also shown activity against:

Amaranthus Parsley piert
Annual meadow-grass    Pale persicaria
Annual sow thistle Polygonums
Charlock Poppy
Chickweed Scarlet pimpernel
Corn spurrey Shepherds purse
Dead nettle Small nettle
Fat hen Sun spurge
Field penny cress Volunteer oilseed rape
Knotgrass Wild radish

Established broad-leaved weeds growing from rootstocks will not be controlled by Emerger. As for other residual herbicides application to a fine, firm seedbed will optimise efficacy. Efficacy will be reduced where application is made to cloddy seedbeds or where there is disruption of the soil surface after application.

2 kg/ha Artist + 1.75 L/ha Emerger is a very robust tank mix that will provide all round control of potato weeds. Emerger bolsters the broad-spectrum weed control of Artist and provides additional activity against high polygonum pressure.


Emerger may be used on all commercial varieties of potatoes


Ridges should be well rounded with few clods. Cultivations should produce a soil tilth that requires no further improvement after planting. Cultivation after spraying will encourage weed germination and reduce the residual activity of Emerger.

Ensure Emerger is applied evenly overall to both sides of potato ridges. Care must be taken to ensure that application takes place before crop emergence.


On mineral soils with a high organic matter content and on peaty or organic soils the residual activity of Emerger may be reduced.

Following crops and crop failure

After a potato crop treated with Emerger, oilseed rape, field pea, dwarf french bean, wheat, barley, oat, winter triticale, winter rye, sugar beet, maize, and sunflower can be established in the normal rotation or in the event of failure of the treated crop, provided that cultivation (using cultivator, disc harrow or similar) and thorough mixing of treated soil has been conducted to at least 10 cm depth.

Radish and phacelia require a period of at least 120 days after application, or plough to at least 20 cm before drilling

Resistance Management

When herbicides with the same
mode of action are used repeatedly
over several years in the same field, selection of resistant biotypes can take place. These can propagate and may become dominating. A weed species is considered to be resistant to a herbicide if it survives a correctly-applied treatment at the recommended dose. A strategy for preventing and managing such resistance should be adopted. This should include integrating herbicides with a programme of cultural control measures.

The latest guidance is available from the Weed Resistance Action Group (WRAG).




What can I mix with Atlantis OD?

Use no more than two additional products in a mix with Atlantis OD – full details are available on the tank mix sheet. For autumn applications, include a residual partner such as 0.3 L/ha Liberator so that the crop is protected against late germinating weeds.


Should I use Atlantis OD or Monolith for black-grass control?

Monolith offers superior and more consistent control of black-grass than Atlantis, particularly when it has some degree of metabolic resistance. In general, Monolith is a better product for controlling all grass weeds while, Atlantis OD gives better control of broad-leaved weeds.  


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