Pine tree problem

Asked June 7, 2017, 9:17 AM EDT

Can you tell me what is happening to these pine trees? A person sent in these pictures. Said it's happening to all the pine trees in this area, some very small and some very large trees. It's a large grove of pine trees.

Wadena County Minnesota

1 Response

The damage was probably done by sawflies. We don't know what species.
Go to the following websites to learn about them and compare photos of trees damaged by sawflies to those you attached to this message.
http://www.forestpests.org/vd/images/0010124-SMPT.jpg
http://www.forestpests.org/vd/183.html
http://entnemdept.ufl.edu/creatures/trees/sawfly/redheaded_pine_sawfly.htm
https://mmtreecare.com/european-pine-sawfly-pine-sawflies/