We have 2 maple trees and both appear to have the same disease. Some of the leaves have red or green nodules on them about 1-2mm in diameter. Some of the leaves have a few, others are completely covered and causing the leaves to wither and die. Any ideas on what this is, and if there are any treatments? Thanks!!

Reply to post by Greg Heckman, on May 20, 2001 at 21:39:17:

Try looking here:

Reply to post by Mark Goodwin, on May 20, 2001 at 21:39:17:

Thanks for the suggestion, but I couldn't find anything in the handbook that was similar to my problem. These "nodules" appear to grow out of the leaves, kind of like a skin tag mole on a person. It seems they start out red, and then turn green. Any other ideas?? Thanks much!!

Reply to post by Greg Heckman, on May 20, 2001 at 22:14:32:

It sounds like a gall to me.
Check out the site below.

Reply to post by Mark Goodwin, on May 21, 2001 at 08:55:52:

I have the same symptoms in the UK with a young Acer Pseudoplatanus "Simon-Louis Freres" - I assumed that these were the eggs of something - until I found this thread; my tree's problem is definitely Maple Bladder Gall.
Thanks a lot!