Question
QUESTION: I have a Sunset Maple about 12-15 feet tall that I planted 3 years ago.  This year, it has developed circular black spots on the leaves only, the leaf edges are red and "burned" looking.  The trunk is peeling and receding on the base and there are vague vetical lines on the trunk.  Please help me save my tree!

ANSWER: Carole:

Sounds like you have a few different things going on with your tree.  Based on your description, I suspect that the leaf spots may be a fungus disease called Tar Spot.  Dark black, raised and mostly circular spots (search for images in Google to look for a match).  If the leaf edges are brown and dry, this may be evidence of drought.  This is a common reaction to low water levels in the soil.  See if these symptoms are widely located over most of the tree.  Deep infrequent watering is suggested.  I am a bit concerned about the receding bark at the base. This may be more serious than the spots and leaf edges.  Can you send a photo of that area of the tree base?  The vertical lines may be a result of sunburn.  These maples have relatively thin bark and can get sunburn if they are out in the full sun and little shade on the trunk area. You are welcome to send a photo of this area as well.

Regards
Steve

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Sunset Maple 2  
Sunset Maple   QUESTION: Here are some pictures.  We've definitely had a drought but the leaves appear red and "singed".  Thanks in advance.

ANSWER: Carole:
There appears to be a significant area at the base of the tree where the bark appears to have been damaged/injured.  This will have a definite impact on tree health and may account for the leaf coloring. This area is an ideal area where decay organisms (bacteria and fungus) can enter the tree and cause decay.  The long term prognosis is probably not good.  As decay advances, the tree will become weaker and weaker.  It may eventually fail, especially if you have a wind storm or ice.  Often time the cause of these basal wounds are mechanical in origin- things like string trimmers and lawnmowers are a death sentence.  Unfortunately, there isn't a magic bullet here- just replacement followed by preventative measures to avoid such damages.

Regards
Steve

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QUESTION: Is there anything I can attempt to try to save it?

Answer
Carole:
The damage appears quite severe. Unfortunately, there is nothing to be done that will reverse the damage done.  A few things to consider that "might" prolong the life of the tree and encourage vigor.  Maintain a good supply of water during those hot/dry months. Proper fertilization, based on a soil test. And avoid any additional wounds to the trunk. Once decay begins, it is a slow, yet progressive process.  If the tree is growing vigorously, it will have the capacity to withstand conditions better.

Regards
Steve