I have never heard of scutch grass but am assuming you mean couch grass?
Apparently Elymus Repens (couch, scutch, ...) has historically been used to make infusions or burned as an incense.
If we harvested native plants (i.e. couch incense, dandelion coffee, nettle tea, etc.), instead of importing pre-packaged alternatives, then our self-seeding plants would probably only survive in remote areas.
I can go to any local GC here and buy a wide range of "natural" plant feeds made from nettles, comfrey, marestail and so on. It doesn't mean there's any less of them in my garden except marestail which, touch wood, I haven't found yet and hope not to. Apparently that used to be sued as a pan scrub because of its silica content and that didn't wipe it out either.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Couch grass can spread by runners and if the digging up of a large sod snaps off even the smallest bit and leaves it behind unnoticed, then the couch grass will just re-grow.
According to the www the roots of couch become exhausted when the grass is regularly cut?
Not in my experience! They just go sideways till they find a lovely border where they don't get cut and can twine their way through the roots of treasures.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Posts
If we harvested native plants (i.e. couch incense, dandelion coffee, nettle tea, etc.), instead of importing pre-packaged alternatives, then our self-seeding plants would probably only survive in remote areas.
https://en.wikipedia.org/wiki/Elymus_repens
http://www.downgardenservices.org.uk/couchgrass.htm