**Be very careful moving around in blackberry bushes...Copperheads love blackberry bushes...**
Spray starting fluid (ether) into the brush a couple inches above and horizontal to the ground, the snakes will retreat quickly. But spray downwind from yourself! And no smoking!
I’ll just be careful when picking blackberries to eat...I’m not spraying anything on the bushes...
As for this whole thread, I see no reason to destroy blackberry bushes anyway...They are too good for jams, jellies, pies and just plain berry eatin’...