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(Active substances: mesosulfuron-methyl and iodosulfuron-methyl-sodium)
As the only effective post-emergence herbicide for use on black-grass in winter wheat, we recommend that you put Atlantis WG at the centre of your black–grass control strategy. Used as part of a programme – preferably in the autumn – it offers unrivalled control of both black-grass and rye-grass.
A combination of chemical and cultural control is needed to effectively deal with black-grass. Used correctly, as part of a programme and together with cultural control, Atlantis WG offers the best post-emergent black-grass control available. It is also effective on rye-grass, mayweed and chickweed. Research has shown that using Atlantis WG can reduce losses due to black-grass by as much as five tonnes per hectare.
To get the best out of Atlantis WG, we recommend that you use it as part of a programme on small, actively-growing weeds in the autumn. The use of a suitable adjuvant increases the uptake of Atlantis WG by the leaves of the susceptible weeds. We recommend our adjuvant biopower, which has consistently outperformed other adjuvants in improving the performance of Atlantis WG. It is also important to avoid complex tank-mixes.
We advise you to always use Atlantis WG as part of a programme. This should include cultural controls such as the use of stale seedbeds, as well as an effective non-ALS pre-emergence herbicide such as Liberator (flufenacet and diflufenican). Atlantis WG works best when applied to actively-growing small weeds in the autumn. It should be tank-mixed with an effective residual partner (see diagram).

| Formulation | Atlantis WG is a dust-free granular formulation that has excellent pouring properties allowing easy transfer to the sprayer. In the event of a spillage the product is easier to clean-up than a liquid formulation. |
| Pack size | 2kg |
| Active substances | mesosulfuron-methyl (30g/kg) and iodosulfuron-methyl-sodium (6g/kg). |
| Safener | mefenpyr-diethyl (90g/kg) |
| Use rate | 400g/ha. |
| Mode of action | ALS Inhibitor |
| Crops | Atlantis WG may only be used on winter wheat (all varieties). |
| Timing of application | GS 12-13 of the grass weed when the majority have emerged |
| LERAP | LERAP B |
| Weed Spectrum | Atlantis WG provides very high and consistent levels of control of black-grass and rye-grass. |

biopower is our adjuvant for use with Atlantis WG and Pacifica.
Because these products act primarily via uptake by the leaves of susceptible weeds, the use of an adjuvant increases uptake. This increased uptake not only enhances the rainfastness of Atlantis WG and Pacifica, but also increases the reliability of the performance under a wide range of environmental conditions.
Our trials have demonstrated that biopower consistently outperforms other adjuvants in increasing the efficacy of Atlantis WG and Pacifica and in enhancing consistency of performance from season to season. These trials have also shown that the use of some adjuvants can be detrimental to the efficacy of these products.
Use biopower at 1 L/ha in order to maximise the efficacy and rainfastness of Atlantis WG and Pacifica.
ALWAYS add biopower to the spray-tank last. Switch off the induction bowl immediately after adding biopower since this can introduce air into the spray-tank and result in excessive foaming.
Here are the main documents relating to Atlantis WG for you to download. You can also find labels, MSDS, tank-mixes and other key documents for all our products here