wheat ears at flowering stage



Trezac™ is a new broad-leaved weed herbicide for cereals, based on ARYLEX™ active together with aminopyralid.

Trezac™ can be used in winter cereals (wheat, spelt, barley, rye and triticale, and spring cereals (wheat, durum wheat, and barley), including crops grown for seed, milling and malting.


  • Provides broad spectrum weed control irrespective of the weather or weed growth pattern – if you can travel it will work
  • Market leading control of poppy
  • Control of ALS / SU resistant poppy
  • No cultivations required before sowing most crops
  • Contains two non-ALS mode of actions 



Barley, Spring

Barley, Winter





Wheat, Durum (Triticum durum)

Wheat, Spring

Winter Wheat

Technical Specifications

Product Registration Number:
MAPP 18253

Active Ingredient:
31.3 g/litre Arylex +  25 g/L aminopyralid

Pack Size:
1.0 Litre

Emulsifiable Concentrate

Maximum Individual Dose:
0.2 L/ha

Maximum Total Dose:
0.2 L/ha

Application Timing:
Winter Cereals
After 1st March
(GS 13-32)
Spring cereals
Between 1st March and 31st May
(GS 13-32)

Water Volumes:
100-400 Litres water/ha.

Spray Quality:
MEDIUM as defined by BCPC

All nozzle types

Buffer Zone:
5m reducible buffer zone
(1m for dry ditches)

30 minutes

Straw Management & Stewardship

  • Trezac must not be used on cereal crops where the straw is intended for animal feed, fodder or bedding. Nor for composting or mulching.
  • Trezac must only be used on cereal crops where the straw is to be incorporated back into the soil and will not leave the farm.



  • Agronomy software will alert to straw restriction
  • Label clearly states no straw removal


For more information download:

Trezac product label
Trezac UK Label.
Trezac safety data sheet
Trezac Safety Data Sheet UK.
Trezac Tank Mix 
Trazac Tank Mix UK.

®™Trademarks of Dow AgroSciences, DuPont or Pioneer and their affiliated companies or respective owners.Use plant protection products safely. Always read the label and product information before use.