Caterpillars on Borage - Knowledgebase Question

Name: Kristen K.
Smithfield, UT
Question by glick1
June 25, 1999
This morning I noticed several leaves of my borage plants hosting a small black, spiny caterpillar about 1/2 inch in length. They spin their own webs then feast on the leaf below. I have been unable to identify this caterpillar. Can you help me? What do you suggest I do to prevent further damage--although it is minimal at this time. So far, I have just crushed the beasties! Thank you!!!
Kris McLain


Image
Answer from NGA
June 25, 1999

0

It's sometimes difficult to identify insects without actually seeing them, but from your description I think it might be a Buckeye caterpillar, which turns into a beautiful butterfly. I found this description and photos in "National Audobon Society Field Guide to Insects and Spiders." The caterpillar can grow up to 2 inches, is "black-gray, striped yellow-orange or whitish along sides, and has many paired branching spines." You didn't mention the stripes along the sides, but in the book's photo, those stripes aren't really noticeable, but the spines sure are!

The butterfly is a creamy brown, with colorful "eyespots" and chevron markings of blue, white and red along the edges of the wings. The caterpillars feed on low herbs, in other words, your borage. Borage is usually a pretty vigorous grower. If you can tolerate a little chewing on some leaves, you'll be creating your own butterfly garden! I'm jealous!

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