Knowledgebase

Bradford Pear, blue substance #872658

Asked June 11, 2024, 4:11 PM EDT

Hello,

Would anyone be able to identify what the blue substance is on the bark of this Bradford Pear tree and if I need to do something about it? Thank you.

Sincerely,

Mary Beth Johnson

Oakland County Michigan

Expert Response

Hi Mary Beth,

This is lichen. Not a problem! Here's an article on this: Lichen, Algae, and Moss on Trees | University of Maryland Extension (umd.edu).

Best,

Lindsay Brown Replied June 13, 2024, 10:33 AM EDT

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.

Loading ...