ClesimaPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

Clesima is a contact and residual herbicide that can be used for the control of a range of broad leaved and grass weeds in any Clearfield oilseed rape hybrid carrying the Clearfield brand.

CLESIMA MUST ONLY BE USED ON CLEARFIELD  OILSEED RAPE HYBRIDS.

COMPLETE CROP LOSS WILL OCCUR IF CLESIMA IS APPLIED TO OILSEED RAPE THAT DOES NOT CARRY THE CLEARFIELD BRAND.

Clesima is suitable for use on all soil types as defined by Soil Texture (85) System, except sands and very light soils and soils containing more than 10% organic mater.

Do not apply to stony soils; i.e. stones, flints or chalk readily visible on surface. On brashy and stony soils, Clesima may cause some reduction in crop vigour and/or plant stand.

Do not apply to cloddy seedbeds. Seedbeds must have a fine, firm tilth for optimum weed control. Loose or cloddy seedbeds must be consolidated prior to application.

Do not apply when heavy rain is forecast and do not use on waterlogged soil or soils prone to waterlogging. Crop thinning or reductions in crop vigour can occur if there is very wet weather after application. Where a crop check has occurred, this

normally grows out after a few weeks and yields are normally unaffected.

Weeds germinating from depth may not be controlled.

Soil moisture is required for effective weed control via root uptake. Residual control may be reduced under prolonged dry conditions.

Care should be taken to avoid overlap of spray swaths.

Do not apply Clesima to crops suffering from stress, which may be caused, for example, by pests, disease, waterlogging, poor seedbed conditions or previous chemical treatment.

Under frosty conditions a transient scorch may occur.

Following application of Clesima, some chlorosis or thinning of the crop can occur but the crop will usually recover completely and yield should not be affected.

Clesima is taken up via cotyledons, roots and shoots and takes maximum effect before, or shortly after, weed emergence.

Optimum results are obtained from applications made to fine, firm and moist seedbeds.

Weeds germinating from depth may not be controlled. Soil moisture is required for effective weed control via root uptake.

Weed:Black-grass 

Rate: 2.0 l/ha Clesima

Critical Comments:Weed susceptibility rating-R ;

This product contains imazamox which is an ALS inhibitor, also classified by the Herbicide Resistance Action Committee as ‘Group B’. Only use as part of a weed resistance management strategy that includes cultural methods of control and does not use ALS inhibitors as the sole chemical method of grass-weed control.

Strains of some annual grasses (e.g. Black-grass, Wild-Oats, and Italian Ryegrass) have developed resistance to herbicides, which may lead to poor control. A strategy for preventing and managing such 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 adviser or product manufacturer.

Populations of black-grass, Italian ryegrass, chickweed and poppy with high levels of resistance may not be fully controlled.

Key elements of the weed resistance management strategy for Clesima: Always follow WRAG guidelines for preventing and managing herbicide resistant weeds. - Maximise the use of cultural control measures wherever possible (e.g. crop rotation, ploughing, stale seedbeds, etc). - Adopt as diverse a rotation as possible using autumn and spring sown crops. - Consider rotational ploughing every 3 to 5 years to improve black-grass control. - Where the Clearfield crop is to be established by non-inversion tillage it is important to obtain high levels of black-grass control in the previous crop. - Do not rely on one herbicide mode of action for the control of grass or broad-leaved weeds in the same field over several years. - For the control of black-grass, ryegrass and wild oats, always use Clesima in tank mix or sequence with other effective graminicides with different modes of action. - Apply post-emergence products/mixtures to small, actively growing weeds to maximise the level of control. - Where there is significant risk of the development of ALS resistant grass weeds, consider the inclusion of a spring crop(s) in the rotation, to increase the opportunity for cultural control measures. - Monitor fields regularly and investigate the reasons for any poor control.

Clesima can be used on any winter Clearfield  oilseed rape hybrid carrying the Clearfield® brand.

For a list of current Clearfield  oilseed rape hybrids contact either your local BASF Agronomy Manager or the BASF Technical Services Hotline: 0845 602 2553.

COMPLETE CROP LOSS WILL OCCUR IF Clesima IS APPLIED TO OILSEED RAPE THAT DOES NOT CARRY THE CLEARFIELD BRAND.

To ensure that Clesima, is only be applied to Clearfield oilseed rape hybrids, it is important to clearly and accurately record the location of Clearfield oilseed crops on the farm and provide relevant information to those staff and contractors applying Clesima.

Clesima may be applied post emergence of the crop from two fully expanded cotyledons (GS 10) and up to the eight true leaf growth stage (GS 18).

Apply Clesima at 2.0 litres per hectare.

Improved control of certain weed species (see Section 2.2) can be achieved by applying 2.0 l/ha Clesima plus 1.0 l/ha of the adjuvant Dash HC.

Following or rotational crops must not be planted until six months after application of ‘Clesima’.

Following crops after normally harvested Clearfield oilseed rape Wheat, barley, oats, oilseed rape, field beans, combining peas and sugar beet can follow normally harvested Clearfield oilseed rape treated with Clesima.

Re-drilling in the following spring due to crop failure in the autumn In the event of crop failure, the following crops may be re-drilled in spring following the guidance given on soil type and cultivation for each crop.

Following crop:Spring barley Spring wheat Sugar beet

Recommended cultivation and soil types: Light to medium soil types – No requirement for specific cultivation techniques.Sands and very light soils or where irrigation may be used - Plough before drilling.

 

Apply Clesima in 190–300 l/ha water volume as a MEDIUM spray as defined by BCPC. In more dense crops where weed shading is more likely use the higher water volume.

To ensure optimum spray coverage and minimize spray drift, adjust the spray boom to the appropriate height above the crop, according to guidance provided by the sprayer and/or nozzle manufacture.

Clesima may be applied at up 2.0 l/ha in 100 litres of water per hectare although efficacy and crop safety at this reduced volume has not been evaluated.

 

Never prepare more spray solution than is required.

Fill the spray tank three quarters full with water and start the agitation. To ensure thorough mixing of the product, invert the container several times before opening. Add the required quantity of Clesima to the spray tank while re-circulating. If required add Dash HC and then the remainder of the water. Continue agitation until spraying is completed.

On emptying the product container, rinse container thoroughly by using an integrated pressure rinsing device or manually rinsing three times. Add washings to sprayer at time of filling and dispose of container safely.

 

Wash sprayer thoroughly (rinsing three times) immediately after use, using clean water and following best practice advice and the guidance provided by the equipment manufacturer. Use of a proprietary spray tank cleaner is recommended.

Controlling volunteers from Clearfield oilseed rape.

Best management practice is to control volunteer oilseed rape plants in the immediate following crop or prior to its establishment.

 

Best management practice is to control volunteer oilseed rape plants in the immediate following crop or prior to its establishment. Volunteers from Clearfield oilseed rape can be controlled with established techniques using a combination of stale-seedbeds, non-selective herbicides, selective herbicides and cultivation methods:-

 

Following a Clearfield oilseed rape crop, post-harvest rainfall will encourage volunteer oilseed rape to germinate, therefore where possible delay any post-harvest cultivations or stubble-hygiene herbicide treatments until this has occurred.

 

 Use a stale-seedbed technique to destroy germinated oilseed rape seedlings using an approved non-selective herbicide treatment, for example glyphosate, and/or cultivation.

 

 Should further germination of volunteer oilseed rape occur, consider repeating the above stale-seedbed process prior to establishment of the next crop.

 

Should volunteer oilseed rape emerge post-harvest elsewhere within the rotation consider stale-seedbed techniques between subsequent crops.

 

 Where it is planned for Clearfield oilseed rape stubble to be used as extended over-wintered stubbles/natural regeneration, volunteer Clearfield oilseed rape must be destroyed in time to prevent viable seeds, paying attention to agronomic guidance and/or management restrictions that may apply to the stubble maintenance.