Acute

Manufacturer
Others
Category
Herbicides
Registered until
Registration expired
Registration number
05170
Active materials

ACUTE is an emulsifiable concentrate containing 100 g/l (9.8 % w/w) pinoxaden and 25 g/l (2.45 % w/w) cloquintocet-mexyl
Controls wild oats and rye-grasses in winter and spring wheat and winter and spring barley

DIRECTIONS FOR USE
IMPORTANT: This information is approved as part of the Product Label. All instructions within this section must be carefully read in order to obtain safe and successful use of this product.
ACUTE is a foliar acting grass weed killer for the control of wild oats, Italian rye-grass and perennial rye-grass (from seed) in winter and spring wheat and winter and spring barley. It is an ACCase inhibitor, also classified by the Herbicide Resistance Action Committee as ‘Group A’.

Restrictions
To avoid the build-up of resistance do not apply products containing an ACCase inhibitor herbicide more than twice to any crop. In addition, do not use this product in mixture or sequence with any other product containing pinoxaden.
Do not use on oats.
Do not spray crops under stress or to crops suffering from waterlogging, pest attack, disease or frost.
Do not spray crops undersown with grass mixtures.
Rain within one hour after application may reduce grass weed control.
Do not allow spray to drift onto neighbouring crops of oats, rye-grass or maize.
Avoid the use of hormone-containing herbicides in mixture or sequence with ACUTE.
When ACUTE is applied first, leave 7 days before applying hormone herbicides. If hormone- containing products are applied first, leave 21 days before ACUTE is applied.

Crops
ACUTE can be used on all varieties of winter and spring wheat and winter and spring barley

Timing
Spray in the autumn, winter or spring from two true leaves (GS12) to before flag leaf-sheath extending stage of the crop. Spraying should be done when the majority of weeds have germinated, but before weed competition reduces yield

Weeds Controlled
ACUTE controls wild oats, Italian rye-grass and perennial rye-grass (from seed) in winter and spring wheat and winter and spring barley

Rate Of Use
Apply ACUTE at 0.3–0.6 litres per hectare, always in mixture with ADDITION adjuvant. The dose rate of ACUTE depends on target grass species and season

Winter and spring wheat and winter and spring barley
Wild oats – apply 0.3 litres per hectare ACUTE from 1st leaf unfolded to flag leaf ligule visible
Italian rye-grass and perennial rye-grass (from seed) – apply 0.45 litres per hectare ACUTE from 1st leaf unfolded to flag leaf ligule visible. Where applications are made to rye-grasses no larger than the 2 tiller stage (GS22) a dose of 0.3 litres per hectare may give acceptable levels of control. Always use as part of a weed control programme including other products active against rye-grasses

Use of adjuvants
ACUTE must always be used with ADDITION adjuvant. The adjuvant should be applied at 0.5% concentration of spray volume, however this may increase to a maximum concentration of 1% of the spray volume where water volumes lower than 200 litres/ha are used.

Resistance Management
This product contains pinoxaden 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. 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 such resistance should be adopted. Guidelines have been produced by the Weed Resistance Action Group.
Key aspects of the ACUTE resistance management strategy are:
Always follow WRAG guidelines for preventing and managing herbicide resistant grass weeds.
Do not use ACUTE or any other ACCase inhibitor as the sole means of grass weed control in successive crops.
Use grass weed herbicides with different modes of action throughout the cropping rotation.
To reduce the risk of developing resistance, applications should be made to young, actively growing weeds.
Use tank mixes or sequences of herbicides with different modes of action within individual crops, or successive crops.
Monitor weed control effectiveness and investigate any odd patches of poor grass weed control. If unexplained, contact your agronomist who may consider a resistance test appropriate.
Use crop rotation and other cultural control measures to prevent and manage herbicide resistant grass weeds.
Only apply ACUTE once per crop.
ACUTE has no residual activity. Optimum weed control will only be achieved when all grass weeds have emerged.
The activity of ACUTE is not affected by soil type, organic matter or straw residues.
ACUTE does not control broad-leaved weeds and if these are present a specific broad-leaved weed herbicide will be required.

MIXING AND SPRAYING
Make sure the sprayer is set to give an even application at the correct volume. Fill the spray tank with half the required volume of water and begin agitation. Add the required amount of ACUTE to the spray tank and allow to disperse before adding any other product. Add the rest of the water and continue to agitate the mixture thoroughly. Always agitate during spraying.

Spray Quality
Apply ACUTE using a conventional fan nozzle producing a spray quality at the finer end of the medium range. Do not use pre-orifice and air induction nozzles as these may give reduced control, which in high weed populations can prove unacceptable. A spray pressure of 2–3 bars is recommended.

Spray Volume
Spray ACUTE in 100–400 litres of water per hectare.

Following Crops
There are no restrictions on succeeding crops in a normal rotation. In the event of a crop failure after application of ACUTE, 4 weeks should elapse after application before rye-grass, maize, oats or broad-leaved crops are planted as replacement crops

Registered for culturesRateBBCH
Winter wheat0.6 l12 - 41
Spring wheat0.6 l12 - 41
Spring barley0.6 l12 - 41
Winter barley0.6 l12 - 41