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Help identifying cocoon - Ask Extension

Any ideas about what this is on my willow tree? What should I do about them? I have done numerous online searches and can’t find anything similar.

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.