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

Saturday - May 26, 2007

From: Austin, TX
Region: Southwest
Topic: Trees
Title: Leaf spot as indicator of Oak Wilt Disease
Answered by: Joe Marcus

QUESTION:

I live close to the Wilflower Center. I have two trees in my front yard which are just now showing brown spots on the leaves. I fear this may be oak wilt. Would it be possible for me to bring some sample leaves to the Wildflower Center and have someone tell me if my trees have oak wilt?

ANSWER:

Browns leaf spot are not normally indicative of Oak Wilt Disease. There are, however, any number of fungi, viruses, insects and other causes which produce spotting of oak leaves. Close examination of the leaves would be required to make a certain diagnosis of the cause. Many fungal diseases are more prevalent in wet years like we are having now. Happily, most oak leaf diseases do not cause serious harm to the trees they attack, though some defoliation may occur.

The Texas Oak Wilt Information Partnership website, which was built and is maintained by the Lady Bird Johnson Wildflower Center and partner organizations, has much more information about Oak Wilt Disease, including information on visual identification.

In the interest of maintaining the good health of the trees at the Lady Bird Johnson Wildflower Center, we would prefer that you do not bring diseased or pest infested plant material to us. A better solution is to send sharply-focused, close-up digital images of the affected plant parts via email to id@smartyplants.org. If we cannot identify the cause of the problem, you may contact your County Extension Service agent, or send a plant sample to the Texas Plant Disease Diagnostic Laboratory at Texas A&M.

 

More Trees Questions

Hackberry stripped by Cedar Waxwings or American Goldfinches
March 27, 2007 - I live in Fort Worth. My one and only tree in the backyard is a 23 year old hackberry. While not infested with gall or weevils, we have been invaded this past few weeks by hordes of small, chubby, yel...
view the full question and answer

Ground cover under trees from Austin
November 03, 2012 - I need ground cover plants that can tolerate leaf litter and grow under oak tree shade.
view the full question and answer

Replacement trees for southwest facing backyard in Austin, TX.
September 23, 2010 - The back of the house we are purchasing faces southwest and is completely devoid of large shade trees. I have been told that the previously existing trees were destroyed by oak wilt. I am in love wi...
view the full question and answer

Revegetating a hillside in western Washington state
October 10, 2012 - Removing several downed trees across my dock demolished the native plants growing on the hillside and the contractor pulled out their remains. The area faces east on an open freshwater bay. Close to...
view the full question and answer

Blocking dust from a road in Sturgis MS
September 20, 2012 - Please let me know what Trees/shrubs will help block dust from dirt road.
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center