Thanks!Not that much would be my guess. Other herbicides do exactly the same thing and have warnings regarding them getting into compost/manure/mulches etc. It's not just forefront. Aminopyralid is also used in OSR which would be at a lower dose from memory but applied over a lot of acres nationally.
Sorry, I meant Aminopyralids in general, and didn't realise it was packaged otherwise in the UK, just Grazeon in the US.
It's not just farmers, it's used a lot in amenity too, I believe. We're about to buy some former dairy pasture for, in part, a small market garden and this stuff's got me concerned.
It can have a half-life of 500days, or 2500 to get it down to 97pc, and it's reputedly effective at killing almost everything except grasses and brassicas at 1part to 1billion. I just find it odd that farmers are still using it, especially as it rules out a diverse sward, and it keeps escaping farm...