Garden Pests and Diseases: What is chewing off my wisteria vines ?, 1 by gch2202

gch2202 wrote:
I have American Wisteria that is just 2 years old, and this year it has started to grow over the top of my arbor. Two weeks ago, I suddenly started finding vines falling down from overhead because the stems (way up on top) have been cut (or chewed) off ! The vines that are falling down are up to 3/16 inch in diameter. I have lost about half of the growth. It is a very clean, straight cut through the wood. It looks like someone took the garden clippers and just cut through the vine, but of course that can't be happening. Would squirrels be doing this, or is there an insect or caterpillar that would do it? I have not seen any type of pest on the arbor or the vines.