I just did a search for raspberry cane borers and a whole lot of websites came up with all the info you need. I've never had the problem or I'd chime in with what works. I live in the Catskills and am surrounded with 4 kinds of wild raspberries so I am filled with them all summer. The only pests we have are deer, and BEARS who eat the entire plant down to the ground, thorns and all!

I wish you good luck!

For years, I had cane and crown borers, Then I read Arden Andersen's

Anatomy of Life & Energy in Agriculture: and started using more Calcium and I believe

what really made the difference was more Nitrogen. Try Growers Mineral Solutions

Schlabach's Nursery sells it. Maybe Nourse sells it too. Both use it to grow their plants.

Dave Rogers