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

Wheat, Winter

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
  • Trezac Stewardship app available for:


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.
TrezacTechnical Information Sheet
Trezac Tech Sheet UK.
Trezac App Guide
Topic Sheet 31 Trezac App.

®™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.