Perhaps John Walker might have those figures as a result of his research, he says hopefully, together with the plant-affecting dose?
i.e. How much active ingredient in how much muck, added to how much soil, will do your crops in. Difficult figure to work out and, from what GLAllotments says it varies by plant species, grasses obviously being immune.
peter,
I honestly don't see the merit for gardeners of going into this amount of complexity and detail (you can dig it out for yourself online if you want to, or refer to the excellent sources of further information on glallotments' website). The bottom line is that these synthetic chemical weedkillers are polluting our environment. Once the damage is done it's hard to put right. We need to stop this problem at source by removing clopyralid from weedkillers. Making composts which use contaminated green waste compost the whipping boy for ignorant/indifferent use of garden chemicals is wrong.
Ricard with an H,
Your French beans haven't been hit by residues - I've never known a year when some of the pods don't tend to curl like this. The leaves are just showing a bit of wind damage, and other scars of a bum growing season. If you go to my article (link above) you'll see some classic weedkiller-affected French bean leaves.
It would be useful if you could post some pictures of the chilli plants to look at. I don't think you can automatically assume the compost is to blame (and even if it is, the problem isn't the compost, but the garden-derived pollution of the raw materials that go into it). This hasn't been a good year for peppers in many areas - not enough light.
