getting rid of wild chervil

Anyone here have any success getting rid of wild chervil? (For those who don't know, wild chervil is an invasive species that has no redeeming value that I know of, that nothing seems to kill).

Is any of the various types of comfrey invasive enough to out-compete wild chervil? At least my free range chickens would enjoy the comfrey...

wild chervil is edible in my experience.Of course it looks like poison hemlock before flowering but if you are sure you have it,I recomend you try it in the winter when nothing else is available.You can dig down through the snow and find its leaves as green and edible as if its no big deal.Cow parsnip or fuki will out compete it but are not neccesarily more virtuous.Yes,this plant has taken off in recent years along the west coast but its better than buttercups which it easily shades out.