I have a problem with our backyard mulberries. There are two female red mulberries, which give us a lot of shade.

For a couple of years, there has been dark, wet staining going down the trunks. It almost looks as though the trees are bleeding. This year we are noticing that some of the smaller branches have died off. The dead branches have peeling bark. There is some yellowish/brown mottling of leaves on some of the healthy branches.

If someone could tell me what is wrong or make some suggestions, I would really appreciate it.

Thanks!
LWB

Reply to post by L Brush, on July 14, 2002 at 18:43:45:

The site linked below has some information about the tree in question.
Not only do you need to know what the problems may be, but what conditions may have contributed to them.
I suggest you look for a local certified arborist to examine your trees and give you recommendations.
It sounds to me like your tree may have a bacterial canker. Whether it is the cause of the branch and leaf problems is uncertain.

Reply to post by Mark Goodwin, on July 14, 2002 at 18:43:45:

The link below offers information about bacterial wetwood, a condition common in mulberry. Perhaps you can compare the symptoms described to what you observe on your tree.

Reply to post by L Brush, on July 14, 2002 at 18:43:45:

Bacterial wetwood is a common problem in While it is unsightly, and may cause some dieback of the twigs, it is not usually fatal. There is no prescribed treatment for it. Some suggest drilling the tree to drain the infection, but this is not beneficial to the tree, and can be actually harmful. The bacteria actually protects against decay inside the tree.

You can wash down the stains occasionally with a stream of water, maybe a little brushing, if you find it very objectionable, but this may not help a lot.