Oskar

Manufacturer
FMC
Category
Herbicides
Registered until
2026-06-30
Registration number
18696
Active materials
Links
DIRECTIONS FOR USE
Important: This information is approved as part of the product label. All instructions within this section should be read carefully in order to obtain safe and successful use of this product.
 
General Information
OSKAR is a contact and systemic herbicide for control of annual grass weeds in wheat and barley. OSKAR will control Black-grass, Wild-oats, Awned Canary-grass and Rough-stalked Meadow-grass.
This product contains fenoxaprop-p-ethyl which is an ACCase inhibitor, also classified by the Herbicide Resistance Action Committee (HRAC)* as ‘Group A’. Use only as part of a resistance management strategy that includes cultural methods of control and do not use ACCase inhibitors as the sole chemical means of grass weed control.
Applying a second product containing an ACCase inhibitor will increase the risk of resistance development. Only use a second ACCase inhibitor to control different weeds at different timings.
Details of the HRAC codes, which may be used as a tool in developing a resistance management strategy may be found on the HRAC web-site at www.plantprotection.org/HRAC/. The Weed Resistance Action Group (WRAG) provides supporting information, including management guidelines, a herbicide-resistant grass weeds audit and facts about resistance at www.pesticides.gov.uk/rags.asp?id=714. It is important to integrate a long-term cultural and chemical weed control strategy and the recommendations of WRAG should be followed.
 
Cautions
Do not apply OSKAR to Durum wheat, undersown crops or crops to be undersown.
Avoid treating crops suffering from stress due to drought, water-logging, pest and disease attack or micronutrient deficiency.
Avoid application immediately before or after a sudden or extended drop in temperature, or during periods of warm days and cold nights.
Do not apply to crops that are covered with ice as run-off may occur. Application may be made in frosty weather provided the crop has hardened.
Do not roll or harrow less than 7 days before or after spraying. Very dry conditions leading to drought stress may reduce the effectiveness of the product.
For control of Black-grass, use OSKAR as part of an integrated control strategy. Do not use OSKAR as the sole means of grass weed control in successive crops; use grass weed herbicides with different modes of action throughout the cropping rotation. Monitor weed control effectiveness and investigate any odd patches of poor grass weed control. If poor control cannot be explained, contact your agronomist who may consider a resistance test to be appropriate.
Oskar applied at 1.0 litre/ha to winter and spring barley can cause yellowing of the crop. These effects are transient and have been demonstrated not to adversely affect yield.
Extreme care must be taken to avoid spray drift onto non-crop plants outside of the target area. Ensure that spray swaths do not overlap.
If OSKAR is used as part of a programme with any other spray chemicals, an interval of at least 7 days must be elapse between applications. In the event of crop failure, any broad-leaved crop may be sown, or aftean interval of 3 weeks, any cereal may be sown. Following normal harvest of a treated crop, any broad-leaved or cereal crop may be sown.
 
Soil Types and Weather
Conditions OSKAR can be applied to all soils including those containing high levels of organic matter. For best results, soil should be moist at and after application.
Crops Treated and Time of Application
OSKAR can be applied to winter- and spring barley from the ’2 fully expanded leaf’ stage to before ’1st node detectable’ stage and to winterand spring wheat from emergence of the crop up to the ‘flag leaf ligule visible’ stage (ZGS39). Broadcast crops should be only treated once they have a well established root system.
 
Rates of Application and Weeds Controlled
The application rates of OSKAR are determined by crop and weed species, size of the weed and time of application. OSKAR must not be applied to winter or spring barley at more than 1.0 litre/ha. OSKAR can contribute to the control of black-grass as part of a herbicide resistance management strategy, involving mixtures and sequences with herbicides of alternative modes of action.
1. Wild-oats
OSKAR will control Wild-oats from the two fully expanded leaf stage (ZGS 12) up to ’before 1st node detectable’ stage (ZGS 31) in winter- and spring barley and from the two fully expanded leaf stage (ZGS 12) up to and including the flag leaf ligule just visible stage (ZGS 39) in winter- and spring wheat. 
 
2. Awned Canary-grass and Rough-stalked Meadow-grass
OSKAR will control Awned Canary-grass and Rough-stalked Meadowgrass from the two fully expanded leaf stage (ZGS 12) up to ’early tillering’ stage (ZGS 23) in winter- and spring barley and from the two fully expanded leaf stage (ZGS12) up to the end of tillering but before the ‘first node detectable’ stage (ZGS 31) in winter and spring wheat.
 
NOTE
Resistance: Strains of some annual grasses (e.g. Black-grass, Wild-oats, 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. Refer to ‘General Information’ and ‘Cautions’ above for additional detail.
To reduce the risk of developing resistance, applications should be made to young, actively growing weeds.
Use crop rotation and other cultural control measures to prevent and manage herbicide resistant grass weeds.
Apply when the majority of wild-oats have emerged but avoid late applications beyond tillering and into the stem extension phase.
 
Water Volume
Apply in 200-300 litres of water/ha using a conventional horizontal boom sprayer. Use the higher water volume where the crop or weed is dense to ensure adequate cover.
 
Spray Quality
Apply OSKAR as a ‘fine to medium’ spray (as defined by BCPC) and 2.5 – 3 bar pressure.
 
Mixing and Application
Shake the container thoroughly before opening and use. Half-fill the spray tank with clean water and begin agitation. Add the required quantity of OSKAR to the water. Rinse the empty container thoroughly with water and add the rinsings to the tank. Complete the filling and apply without delay. Maintain agitation while travelling and throughout the spraying operation. Wash out the sprayer thoroughly after use using a recognised tank cleaner.
 
Use of Adjuvants
Esterified seed oil adjuvants are suitable for use with OSKAR in winterand spring wheat. Compliment (ADJ0578) is recommended. Do not use an adjuvant with OSKAR in winter- and spring barley.
 
Company Advisory Information
1. Ensure that spray swaths do not overlap.
2. If OSKAR is used as part of a programme with any other spray chemicals, an interval of at least 7 days must be elapse between applications. The (CoSHH) Control of Substances Hazardous to Health Regulations may apply to the use of this product at work.
 
Registered for culturesRateBBCH
Winter wheat1.2 l39
Spring wheat1.2 l39
Spring barley1 l31
Winter barley1 l31