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Black insect with spiky spine...what is it? - Ask Extension

I found this insect on a leaf of lettuce from my garden in Minneapolis. I don't see damage to the lettuce, and I've not been able to identify it. It i...

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.