OthelloPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

A contact and residual herbicide (including two sulfonylurea herbicides) for use as a post-crop emergence treatment for the control of a wide range of broad-leaved weeds and meadow-grasses in winter wheat.

Othello is the product that we recommend for outstanding post-emergence control of annual meadow-grass and broad-leaved weeds in winter wheat. It is the first ODesi oil dispersion herbicide that we have launched in the UK. Its unique formulation provides better retention, spreading and uptake by the weed leaf.

Not only is Othello specifically designed with meadow-grass and broad-leaved weeds in mind, it can also be used at later growth stages right up to GS 31. This allows it to control bigger weeds throughout the season.

Provides outstanding post-emergence control of annual meadow-grass
Unique formulation gives both contact and residual control ensuring maximum effectiveness on both annual meadow-grass and a range of broad-leaved weeds
Can be used following a residual that has failed to control annual meadow-grass or broad-leaved weeds
Safe on all varieties of winter wheat
Flexible timing application from post-emergence of crop to GS 31

To get the best from Othello, we recommend that you use it in good growing conditions with adequate soil moisture when weeds are actively growing. It works best when we are going into a cold spell rather than just coming out of one. Allow two hours of fine weather after application to a dry leaf. To get the best residual control, the seedbed should be fine, firm, moist and without clods. Strict adherence to the tank-mix recommendations will ensure that crop effects are minimised.

Othello should be used in conjunction with our highly effective adjuvant, biopower
Don’t use alongside chlorpyrifos as this may result in crop damage
Othello should not be applied to frosted, waterlogged or stressed crops
Avoid application to wet or ice-covered leaves as run-off may occur
Do not use Othello specifically for the control of annual grass-weeds other than meadow-grasses
Othello cannot be used in sequence or tank-mixed with other grass-weed ALS herbicides
Autumn-applied Othello can be used in sequence with Chekker (iodosulfuron and amidosulfuron) or Eagle (amidosulfuron) applied in spring
Spring-applied Othello can be used in sequence or tank-mixed with Chekker or Eagle

WINTER WHEAT
Maximum individual dose: 1.0 L/ha
Maximum number of treatments: One per crop
Latest time of application: Up to first node detectable stage (GS 31) of the crop

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
DO NOT use Othello on crops undersown with grasses, clover or other legumes or any other broadleaved crop.
Only one “ALS inhibiting” herbicide can be applied to the same crop in sequence or in tank-mixture with Othello. Refer to the table under SEQUENCES & TANK MIXTURES for details.
Othello must not be applied to any crop suffering from stress as a result of drought, waterlogging, pest or disease attack, nutrient deficiency, soil compaction or other factors reducing crop growth.
Because some non-target crops are sensitive to Othello, extreme care is required to avoid drift onto plants outside the target area, or onto ponds, waterways or ditches.
Application should not be made to frosted crops. Sharp or severe frosts following application may cause crop scorch from which the crop will normally recover.
Crop effects may be observed following treatment, particularly on spray overlaps and for late season/ spring applications. These effects are transitory in nature and will normally have no adverse effect on grain yield.

WEEDS CONTROLLED
Strains of some annual grasses (e.g. black-grass, wild-oats and Italian rye-grass) have developed resistance to herbicides which may lead to poor control. A strategy for preventing and managing
resistance should be adopted. Guidelines have been produced by the Weed Resistance Action Group and copies are available from the HGCA, CPA, your distributor, crop advisor or product manufacturer.

Annual meadow-grass
Susceptible post-emergence to GS23

Rough-stalked meadow-grasses
Susceptible post-emergence to GS23

Common chickweed
Susceptible post-emergence to branching stage (10 cm diameter.)

Mayweeds
Susceptible post-emergence to GS18 (8 true leaves)

Common field speedwell
Susceptible post-emergence to GS16 (6 true leaves)

Field pansy
Susceptible post-emergence to GS16 (6 true leaves)

Common poppy
Susceptible post-emergence to GS16 (6 true leaves). In mixed growth stage populations control of late growth stage plants may be incomplete.

Groundsel
Susceptible post-emergence to GS14 (4 true leaves)

Red deadnettle
Susceptible post-emergence to GS14 (4 true leaves)

Shepherd’s purse
Susceptible post-emergence to GS14 (4 true leaves)

Charlock
Susceptible post-emergence to GS16 (6 true leaves)

Volunteer oilseed rape
Susceptible post-emergence to GS16 (6 true leaves)

Cleavers
Moderately susceptible post-emergence to GS12 (2nd whorl stage). Useful levels of control can be achieved, but a follow-up treatment with a specific cleaver herbicide may be required in some situations.

Othello is a highly active herbicide with foliar activity against meadow-grasses and a range of broadleaved weeds. The actual time taken for herbicidal symptoms to appear and death varies between
weed species, timing of application and weather conditions. In some cases symptoms may not be apparent for up to 4 weeks.
As Othello is active primarily via foliar uptake good spray coverage of the target weed is essential for optimal efficacy.
To reduce the risk of developing resistance or where resistance to ALS herbicides is suspected, applications should be made to young, actively growing weeds. Due to the risk of resistance development, Othello should not be used where annual grass weeds other than annual meadow-grass and rough-stalked meadow-grass are present. Always follow WRAG guidelines for preventing and managing herbicide resistant grass and broad-leaved weeds.
Do not use Othello as a stand-alone treatment for common chickweed or common poppy. Only use in a tank mixture or sequence with herbicides with non-ALS modes of action for the control of common chickweed or common poppy. Do not use Othello as the sole means of grass weed or broad-leaved weed control in successive crops. Always use grass and broad-leaved weed herbicides with non-ALS modes of action throughout the cropping rotation. Always monitor the effectiveness of weed control and investigate any odd patches of poor grass or broad-leaved weed.

CROP SPECIFIC INFORMATION
Winter wheat
Apply via a horizontal boom sprayer at a rate of 1.0 L/ha. Apply in 100-300 L/ha as a FINE to MEDIUM spray (BCPC category). Use application techniques which ensure good weed coverage and
crop penetration, using flat fan nozzles. Ensure that spray swaths do not overlap. Always use Othello in mixture with authorised adjuvant Biopower (ADJ: 0617) at a rate of 1.0 L/ha.
Only one application of Othello should be made to the crop.
For use on all varieties of winter wheat.
Apply from post-emergence of the crop up to first node detectable stage (GS 31).

SEQUENCES AND TANK-MIXTURES
Only one “ALS inhibiting” herbicide can be applied to the same crop in sequence or in tank mixture with Othello. Othello may be applied to the same crop in sequence or in tank mixture with one of the
following “ALS inhibiting” herbicides:
Alias SX, Eagle, Presite SX, Ally Max SX, Finish SX, Ratio SX, Avro SX, Galaxy, Refine Max SX, Barton WG, GF-184, Sekato, Biplay SX, Harmony M SX, Simba SX, Boxer, Headland Sure-Fire Gold, Slalom, Calibre SX, Hiker, Spitfire, Chekker, Hunter, Starane Gold, Chimera SX, Inka SX, Starane Vantage, Cleancrop Mondial, Klaxon*, Starane XL, Concert SX, Klaxon OD**, Traton SX, Dakota, Mozaic SX.
* Up to 50 g/ha Klaxon may be applied with Othello
** Up to 25 mL/ha Klaxon OD may be applied with Othello

Othello may be applied to the same crop in sequence with one of the following “ALS inhibiting” herbicides:
Absolute#, Bullion#, Ductis SX#, Exceed SX#, Lexus SX#, Staka SX#.
# To avoid increased selection of herbicide resistant black-grass, a sequence of Othello with one of these products is only permitted where the product containing flupyrsulfuron-methyl has been applied in tank-mix with a suitable residual partner e.g. pendimethalin and/or flufenacet based products and before black-grass emergence.

These sequences and tank mixtures must only be applied in accordance with label recommendations for every product in the sequence or tank mixture. Aside from those listed above, do not use in
sequence or tank mixture with any other ALS inhibitors, such as sulfonylureas, unless specifically permitted on the label for either product.
As part of the Herbicide Resistance Management Strategy for Othello, do not apply Chekker or Sekator in sequence with Othello for the control of common chickweed or common poppy in order to
avoid increased selection for herbicide resistant individuals. Do not tank mix with chlorpyrifos. Allow at least 14 days before or after chlorpyrifos treatments.

FOLLOWING CROPS and CROP FAILURE
Winter wheat, winter barley and winter oilseed rape may be sown in the year of harvest to succeed a winter wheat crop treated with Othello. Spring wheat, spring barley, spring oilseed rape and sugar
beet may be drilled in the spring following harvest of the Othello treated winter wheat crop.
Prior to drilling winter or spring oilseed rape or sugar beet, plough or cultivate to 15cm prior to drilling. Occasionally in oilseed rape crops some seedlings may show slight discolouration on the cotyledons.
These effects are quickly outgrown and should not affect subsequent growth. 
In the event of crop failure for any reason, soil treated with Othello can be re-drilled with winter wheat or spring wheat after normal cultivation. An interval of 6 weeks should elapse between treatment of the failed crop and drilling the replacement crop.
Where Othello is applied in sequence or tank mixture with Eagle, Chekker or Sekator only sow the winter wheat, winter barley, spring wheat, spring barley and sugar beet as following crops in the
normal rotation. Where Othello is applied in sequence or tank mixture with other permitted “ALS inhibiting” herbicides, always follow the most restrictive label with regard to following crops.

MIXING
Shake well before use. Add the recommended quantity of Othello to the spray tank half-filled with the required quantity of clean water. Add the remainder of the water with the sprayer agitation system in operation. Maintain agitation during mixing and loading and until spraying is complete. Do not leave the sprayer standing with chemical in it.
To avoid subsequent damage to crops other than winter wheat it is important that the spray tank, boom, hoses, filters and nozzles are thoroughly washed out to remove all traces of Othello immediately after spraying using a proprietary sprayer cleaner (e.g. All Clear Extra) according to the label instructions for that product.
Do not mix any bleach or chlorinating agent with any ammonia-based cleaning agent as toxic gases may be liberated.