USDA Forest Service Scientist Nathan Siegert measures the diameter of a maple tree with evidence of ALB in West Boylston, MA

Post date:
Aug 29, 2011
USDA Forest Service Scientist Nathan Siegert measures the diameter of a maple tree with evidence of ALB in West Boylston, MA. Photo by Dave Orwig, Harvard Forest.
Photo courtesy of: 
Dave Orwig, Harvard Forest
From: 
Harvard Forest scientists say Asian longhorned beetle spreading in New England forests