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Milberger's Nursery and Landscaping
3920 North Loop 1604 E.
San Antonio, TX 78247

Open 9 to 6 Mon. through Sat.
and 10 to 5 on Sun.

Three exits east of 281, inside of 1604
Next to the Diamond Shamrock station
Please click map for more detailed map and driving directions.

Click here


Question: I noticed that a number of post oak trees on my 20 acres
(trees not necessarily next to each other) where patches of bark is
falling or has fallen off and a reddish brown powdery fungus(?) is
evident. If I rub it or spray water on it, it easily blows off. Each
of these trees appear to be dead or dying. Is this in fact a fungus?
Will it spread to all the other trees? Is there anything reasonable I
can do to kill the fungus or stop if from spreading?

Answer: The peeling bark is a classical sign that the tree has
succumbed to Hypoxylon Canker. This stress related disease has killed
many trees as a result of the drought conditions that we have been
under. There is no known control for Hypoxylon Canker other than
maintaining the tree in a healthy state. For more information see the
Texas Forest Service article found at