posted 7 years ago
Hello Cori!
From a limited observational perspective, it appears the frass left behind, and chew patterns, would most likely be from some type of catipilar. I would start by looking for larval stage grubs or catipilars hiding on your plants or around the area. Take note of any herbivorous bugs or larvae you find in the search, and hand pick them. Im sure with a little effort, you'll find the most likely culprit.
Hope that helps!