Foamy bark canker actively foaming
29 October 2016.
Paul Cooper collected the branch on Cooper2, as seen at this page. The image of the branch is below, and the red circle indicates the area that the following video and photos were taken from. We were able to video, and photograph, the holes emitting foam.
The diameters of the holes are about 0.25-.33 millimeters. Each foamy spot is associated with one of these tiny beetle entry holes.