A post-emergence graminicide for use in oilseed rape and sugar beet.

Please see downloads for individual guidance documents for each crop.


Product use: Centurion Max

Composition: 120g/l clethodim

Formulation: Emulsion concentrate

Registration number: MAPP 16310

Chemical family: Cyclohexanedione (Dimes)- Group HRAC: A

Mode of action: Foliar and Systemic. After application the compound is rapidly absorbed by the treated plant parts and is readily translocated to the root system and to the aerial growing parts of the plant. Typical symptoms on susceptible grass weeds visible 1-2 weeks after application are stunting of growth and yellowing of leaves of the treated plants, followed by plant death.

Shelf life: 2 years

Storage conditions: Temperature from -10C to +35, keep in original container, tightly closed, in a safe place.

More information: ukenquiries@arysta.com

Registered Use
Crops Maximum individual dose of product)
Maximum number of treatments Latest time of application
Oilseed rape (winter) 1.0 One per crop Before the beginning of stem elongation and 120 days before harvest
Sugar beet 1.0 One per crop Before row closure and 56 days before harvest
Directions of Use

Resistance management:

Strains of some annual grasses (eg 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 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.

This product contains clethodim which is an ACCase inhibitor, also classified by the Herbicide Resistance Action Committee as “Group A”.

Use only as part of a resistance management strategy that includes cultural methods of control and does not use ACCase inhibitors as the sole chemical method of grass-weed control.

Applying a second product containing an ACCase inhibitor to a crop will increase the risk of resistance development; only use a second ACCase inhibitor to control different weeds at a different timing.

Centurion Max may control some resistant populations of Black-grass to some other ACCase inhibitors. Do not use reduced doses of Centurion Max on grassweeds where resistance is suspected. Populations of annual grasses may show resistance to Centurion Max and will not be fully controlled.

It is recommended to adopt a long-term strategy integrating cultural and chemical measures. The following are the key elements of the resistance management strategy:

- 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, delayed drilling etc.)

- Use tank mixes or sequences of effective herbicides with different modes of action within individual crops, or successive crops.

- To reduce the risk of developing resistance applications of Centurion Max should be made to young, actively growing weeds.

- Identify as much as possible the herbicides to which your grass weeds are resistant. This can help you to determine the most appropriate herbicides to use.

- Monitor fields regularly and investigate the reasons for any poor control.

To avoid the build-up of resistance, do not apply products containing an ACCase inhibitor more than twice in any crop. In addition, do not use this product in mixture or sequence with any other product containing clethodim.


After application, Centurion Max requires at least 12 hours without rain for uptake to be complete.

Weeds suffering stress because of drought, frost, waterlogging, natural dieback or other environmental conditions will not be growing actively and so will not be well controlled, as such conditions could interfere with uptake and translocation of Centurion Max.

Do not cultivate for at least two weeks after application to allow time for translocation to occur. Leave a longer interval (up to 3 weeks) if growing conditions are poor.

Oilseed rape (winter):

It is recommended to apply Centurion Max at 1 L/ha from the 2 true leaf stage during a period when grass weeds and crop are growing actively in the autumn.

Sugar beet:

Centurion Max can be applied at 1.0 L/ha when the crop has fully expanded cotyledons or first leaves until before row closure.


Please see downloads for detailed guidance documents for oilseed rape and sugar beet.