Question
QUESTION: I have a 5 year old lilac.  This spring, after blooming top leaves started turning yellow.  Now most of the tree has yellow and green leaves that curl down.  Leaves have brown spots on the underside and  spots on the top of leaf.

Bark has split on one branch.  Bark is ripping itself off the tree.

Can you diagnose this disease or fungus?  Can the tree be saved?

Thanks very much.

Nancy

ANSWER: Nancy:

Bark splitting and loss may indicate internal problems or perhaps root related issues.  The yellow leaves and apparent drooping/wilting of green leaves may also be indicators of root related problems. If the bark is coming off the main stem, this may be a terminal situation.  Difficult to tell w/o seeing your tree in person.  You may wish to contact your local county Agricultural Extension Service or your local arborist to arrange for a tree evaluation.  Be sure the tree is watered well, especially if it has been hot and dry lately.  Look for physical wounds near the base of the tree as well.  I will be glad to look at a photo if you can send.

Regards
Steve

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Sick lilac katherine h  

sick lilac   QUESTION: I am sending photos of Lilac Katherine Havermeyer.  All this occurred since spring this year.  Like you, I believe it is not going to be saved.  We found a white fungus when we dug up a rose tree and a near-by Japanese maple died this year.  These are all located closely together.

The other lilac is all right and my neighbor's lilacs are all right so I think it is a white fungus under the soil.  The tree is only 5 years old.  

Thanks for your time.

Nancy

Answer
Nancy:

The white fungus could be one that can cause a root rot or wood decay.  I noticed in your image that the foliage is quite pale.  I also noticed the plant below this tree with yellowing.  Has there been any weed killers (herbicides) applied to the soil or sprayed on the plants?

Also, from your image are the two marks on the stem.  This looks like a cut made by a sharp object.

If you intend to replace your tree, it is a good idea to have a soil test done to make sure the soil is in good condition for a tree.  Contact your local nursery/garden center to look at your options.

Steve