Synero (3 litre pack size)

£221.40 (exc. VAT: £184.50)

MAPP 18578 / PCS 05394

Synero is a selective herbicide for controlling invasive species, scrub and deep-rooted perennials in amenity grassland areas. It contains aminopyralid and fluroxypyr.

Good leaf coverage will enable the active ingredients in Synero to penetrate the waxy surface and move to the plant’s roots, delivering high levels of control over a wide range of invasive species.

  • Fast acting – rain-fast in only one hour
  • Versatile – suitable for use on amenity grassland, including roadside verges and rail embankments
  • Controls difficult species – weeds such as Japanese knotweed and ragwort
  • Low application rate – offers a high level of control with less product
  • Can be used around infrastructure on highway verges to reduce strimming requirements.

Treated grass must not be used for grazing.

Please confirm you are certified


Synero is a selective herbicide for use with a conventional knapsack or boom sprayer.

Maximum individual dose

  • For applications made between 1st March and 31st May, 1 application may be made per calendar year
  • For applications made between 1st June and 31st July, only 1 application may be made in a 2 year period
  • Do not use between 31st July and 1st March.

Application Rates

Weeds controlledApplication Rate (One application per year)Knapsack Dilution Rate
Broad-leaved dock, curled dock, creeping thistle, spear thistle, Japanese knotweed, common nettle, creeping buttercup, mugwort, ragwort and bramble 2 litres per hectare100ml in 10 litres of water

Active Ingredients

Synero contains 30g/l aminopyralid (present as 36g/l aminopyralid potassium) (3.5% w/w) and 100g/l fluroxypyr (present as 144g/l fluroxypyr-methyl heptyl ester) (14.14% w/w).