Depending on how many fruit bushes you have, you might want to cut your losses, and dig everything out, then replant the fruit bushes.
We had the same problem some time ago, and the couch was so tightly rooted around the raas, they were literally being strangled!
The soil was so compacted, I had to use a pickaxe to loosen it all! Couch is a menace, and IMHO, it has to be dug out and burned, but that's a big call on a large fruit area!