July, 2004 David L. Roberts, Ph.D. Michigan State University Extension Managing Tar Spot on Maple Tar spot on maple, caused by the fungus Tarus Spotius Maximilius (just kidding), has

Kimberley Willis Detroit Gardening Examiner Trees have been on the minds of many Michigan gardeners this year. It seems like our landscape trees are under assault from all directions. A new prob

Hey, who splashed tar all over the leaves of my lovely maple tree? At least that's what looks like happened when maples have the aptly named fungus disease "tar spot". It is manifested by shiny bla

Tar spot is one of the most readily visible and easiest diseases of maple to diagnose. At the same time, it is one of the least damaging ailments on its host. Tar spot is a little like anthracnose. Th

Tar Spot can be found throughout the natural range of maple trees, but is most common in the eastern part of the United States. Although Tar Spot has a minimal effect on the health of a maple tree its

The following question was sent to the P&PDL diagnosticians here at Purdue University: Question: Almost every summer the leaves on my maple trees have black spots on them that look like tar. What i

Question: Something is wrong with my Norway maple. Leaves have been falling off the tree for the past three to four weeks. The leaves still on the tree have very dark, almost black, spots with a yell