Aaron Weishar New Member Joined Nov 14, 2014 Messages 4 Reaction score 1 May 3, 2019 #1 Hi. This Norway maple has rust coloured powdery-looking stuff here and there on the trunk bark. Does anyone know what this might be and if it is a problem? Thank you. Attachments Norway Maple with rust powder.jpg 1.2 MB · Views: 11
Hi. This Norway maple has rust coloured powdery-looking stuff here and there on the trunk bark. Does anyone know what this might be and if it is a problem? Thank you.
Oldmaple Tree Freak AS Supporting Member. Joined Jul 23, 2012 Messages 11,722 Reaction score 95,683 Location West Michigan May 4, 2019 #2 That is a type of lichen. Not a problem.
Jason Douglas ArboristSite Guru Joined Oct 23, 2016 Messages 549 Reaction score 348 Location Columbus May 7, 2019 #3 Yes, no worries