Simba SX

Manufacturer
DU PONT
Category
Herbicides
Registered until
2025-09-30
Registration number
18791
Active materials
Links

Formulation
A soluble granule formulation containing 200 g/kg metsulfuron-methyl, a sulfonylurea.

Rainfastness
Rainfast after 2 hours from application provided good drying conditions.

DIRECTIONS FOR USE
IMPORTANT: This information is approved as part of the Product Label. All instructions within this section must be read carefully in order to obtain safe and successful use of this product.

Restrictions
SIMBA SX, alone or in tank-mix, must not be applied to any crop suffering from stress as a result of drought, waterlogging, low temperatures, pest or disease attack, nutrient or lime deficiency or other factors reducing crop growth.
Do not use SIMBA SX on cereal crops undersown with grasses, clover or other legumes or any other broad-leaved crop.
SIMBA SX must not be tank-mixed with chlorpyrifos. Allow at least 14 days between application of SIMBA SX and chlorpyrifos treatments.
When using tank-mixtures take care not to overlap spray swaths.
SIMBA SX should not be applied within 7 days of rolling any crop.
Do not use SIMBA SX in tank-mix on oats, triticale and linseed. On Linseed allow at least 7 days between SIMBA SX and other treatments (10 days if crop is growing poorly or under stress).
Contract agents should be consulted before using on crops grown for seed.

Due to the high level of activity of the herbicide, special care must be taken to avoid damage by drift onto broad-leaved plants outside the target area, or onto ponds, waterways or ditches. Thorough cleansing of equipment is also very important – see ‘Spray-tank cleanout’.
Refer to ‘Compatibility’ for details on use of SIMBA SX with other ‘ALS inhibiting’ herbicides.

Weed Control
SIMBA SX is a highly active herbicide with foliar and root activity against a wide range of broad-leaved weeds. It is most effective when applied to small actively growing weeds. As larger weeds often become less susceptible, it is important to note the size of each weed species at the time of application. Good spray cover of the weeds must be obtained. Weed control may be reduced when soil conditions are very dry. Nevertheless, with adequate soil moisture, susceptible weeds germinating soon after treatment will be controlled.

Weed Resistance
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 resistant to a herbicide if it survives a correctly-applied treatment at the recommended dose. Development of resistance within a weed species can be avoided or delayed by sequencing or tank-mixing with suitable products having a different mode of action. A strategy for preventing and managing resistance should be adopted. The Weed Resistance Action Groups have produced guidelines and copies are available from the HGCA, CPA, your distributor, crop adviser or product manufacturer.

Susceptible Weeds
The susceptibility ratings of weeds in the following table refer to good spray cover and good growing conditions.

Soil
SIMBA SX can be used on all soil types.

Volume and application
Apply in 100 - 400 litres of water per hectare, using suitable equipment to give good spray cover of the weeds. The higher volume is recommended when crops are thick or weed
growth dense. When applying SIMBA SX, care should be taken not to overlap spray swaths.

Mixing
Before using SIMBA SX, make sure that the spraying equipment is clean. SIMBA SX mixes easily with water, but the following mixing procedure should be followed: Quarter fill
the spray tank with water, start the agitation and add the required quantity of SIMBA SX directly to the tank without prior creaming. Continue agitation while topping up the tank and while spraying.

Compatibility

To widen the spectrum of activity and improve the control of some weeds, SIMBA SX may be applied with other herbicides, provided each product can be applied within the label recommendations for its use. Always add SIMBA SX to the spray tank first when using in tank-mix. The following ‘joint application’ with other sulfonylurea and ‘ALS inhibiting’ herbicides may be applied to a crop. Requirements and restrictions on other product labels must be adhered to. ‘Joint application’ is the use of SIMBA SX in tank mixture or sequence with one of the products listed below.

CROPSCereals SIMBA SX can be used on all winter and spring varieties of wheat, oats, barley and triticale. SIMBA SX must only be applied from 1 February, provided the crop has at least two leaves (wheat, oats and triticale) or three leaves (barley), until before the flag leaf extending stage.

Dose Apply SIMBA SX at 30 g/ha when used alone or in tank-mix with other herbicides.
Following Crops Only cereals, oilseed rape, field beans or grass may be sown in the same calendar year to succeed a cereal crop treated with SIMBA SX.
Linseed SIMBA SX should be applied to actively growing linseed (all varieties) from the growth stage "first pair of true leaves unfolded", up to 30 cm high or before flower buds visible, whichever comes first. Most annual weeds are best controlled by the earliest application possible.
Dose Apply SIMBA SX at 30 g/ha.
Following Crops.

Only cereals should be planted within 16 months of applying SIMBA SX to a linseed crop. In the event of crop failure for any reason, sow only wheat within 3 months of the application of SIMBA SX.
Green cover on land temporarily removed from production e.g. set-aside SIMBA SX may be applied to areas temporarily removed from production where the green cover is made up predominantly (i.e. sufficient to maintain reasonable cover) of grassland, wheat, barley, oats or triticale. Where established grass species are the main cover crop, some discoloration and stunting may occur. SIMBA SX is selective to seedling cereals from the three-leaf stage (GS 13) but should not be used on seedling grasses.

Dose and timing Apply SIMBA SX at 30 g/ha in 100 - 400 litres of water/ha before 1 August in year of application. The higher volume is recommended when weed growth is dense. Only one application of a sulfonylurea-containing product must be made per calendar year to green cover on land temporarily removed from production.

Following crops
Sow only cereals within 16 months of applying SIMBA SX on green cover on land temporarily removed from production e.g. set-aside.

General
SIMBA SX effectively controls broad-leaved docks, with best control achieved from application three weeks before or after cutting. Many other broad-leaved plants occurring in the “Set-aside” area will also be controlled or partially controlled, hence it may not be suitable for use where wild flower borders or other forms of conservation headland are to be developed. Before using on land taken out of production as part of a grant-aided scheme, ensure compliance with the management rules of that scheme.

Registered for culturesRate
Winter wheat30 g
Spring oats30 g
Winter barley30 g
Winter triticale30 g
Winter flax30 l
Spring wheat30 g
Winter oats30 g
Spring barley30 g
Spring triticale30 g
Spring flax30 l