We have a maple tree that is probably over 30 years old. About one month ago it began to loose green leaves, they began to wilt and now have all turned brown and dead. Ihave noticed a small ant like bug approximately 1/2 inch long reddish color with stripes on the tailend.
Could this be the problem and will spraying help or is it too late?

Reply to post by Carla, on August 28, 2002 at 21:40:48:

Without knowing the maple species, the location, and other factors affecting the issue, I would guess that your tree may be suffering from Verticillium wilt, a normally soil-borne fungus that enters through the roots and plugs the vascular systems, reducing transport of water and minerals.

It is possible that your tree may have some other problem with the roots. The insect you describe does not sound familiar to me, but you could trap one and get it identified, to see if it is a harmful type. It may be a late comer to the scene and not a causative factor.

Verticillium infection seems to be largely related to trees growing in stressed conditions, such as drought or soil compaction. That is why improved cultural practices are recommended to try and prevent or reverse this disease. Unfortunately, it is often too late. It may also point to the need to choose trees more adaptive to the planting site.

Reply to post by Mark Goodwin, on August 28, 2002 at 21:40:48:

I didn't look carefully at your post title, so I missed the species reference when I jumped to the body of your post. The linked site below gives information about Acer rubrum. It is a highly adaptable species, but not immune to problems. Interestingly, Verticillium is not mentioned under the section on damaging agents, although a number of insects are listed. Armillaria mellea root disease is mentioned.
Make sure that soil compaction is not an issue, and irrigation and drainage are not a problem, and there has been no disruptive activity in the root area. Then look for signs of borer activity, which is is often a sign that the tree has become severely weakened.
Many times maples are also subject to girdling roots. This can be determined by a root crown inspection. That is a careful excavation around the tree base where the main roots originate. If a root grows around the trunk base it can strangle the flow from the roots. Sometimes these girdling roots are below grade; other times they can be seen at the surface.