En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Sunday - September 26, 2010

From: Mansfield, TX
Region: Southwest
Topic: Trees
Title: Problem with oak trees in Mansfield, Texas
Answered by: Nan Hampton

QUESTION:

We have lost 2 large oaks last year & now another is nearly gone. It has several large patches of missing bark - beneath a thin layer of skin-like membrane that seemed to separate it from the bark is black. A nearby tree has several small areas that look the same. I am sending an email with a picture to accompany this. I hope you can help me with what is wrong with our trees.

ANSWER:

From your description and from the photo of your oak tree that you sent it appears that it is probably hypoxylon canker, a fungal disease.  Here is more information from East Texas Gardening of the TAMU AgriLife Extension Service and from Oklahoma Cooperative Extension Service.  As you will read in these two articles, there isn't really anything you can do to save the trees that have been infected already.  Assuring that your other trees are in a healthy condition can prevent them from being infected.  Stress, such as drought and injury to the trunk, make trees susceptible to infection.  You might consider contacting the Tarrant County AgriLife Extension Office to see if they have more information about the disease in the county.  They also have an "Ask an Expert" feature that you might like to use to see if they have suggestions on maintaining your uninfected trees.  The Texas Forest Service also has an "Ask the Experts" feature.

 

 

More Trees Questions

Native Christmas tree from Smithville TX
December 16, 2012 - I've always wanted to use a native tree as a Christmas tree. Do you have any suggestions?
view the full question and answer

Concerns about swings on trees in Arboretum from San Marcos
June 01, 2012 - Dear Mr. Smarty Plants, We very much enjoyed our visit to the new Arboretum this morning! It is already lovely with native species but will really be something with the additions the Wildflower Cent...
view the full question and answer

Splitting bark on non-native mimosa from Buda TX
June 24, 2012 - What would cause my Mimosa tree to have splitting bark. I've only lived in this house for 8 months and am learning about this tree. The other tree seems fine. It looks as though it split and then ...
view the full question and answer

Double trunks on bur oaks in Houston
March 15, 2010 - I am involved in a garden club propagation project. One of the trees we have had success propagating is the Bur Oak. Two of these baby Bur Oaks have multi trunks..one has two and the other has three....
view the full question and answer

Neighbor's Arizona ash roots in Houston
September 30, 2009 - There is a huge Arizona Ash tree in my neighbor's yard. Its trunk is about 27 feet away from the foundation of my house and its foliage reaches my roof. I am planning to dig a trench on my side of t...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center