Rent Shop Volunteer Join

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

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

Sprouts from Sabal palmetto in Charleston SC
July 23, 2010 - I live in SC and have several palm trees (our state tree and symbol). The trees are wonderful, but my situation concerns the many, many sprouts that appear in the flower beds around the trees? Is the...
view the full question and answer

Stressed Texas persimmon, Diospyros texana
September 12, 2009 - I planted a 5' Texas Persimmon last May..it is watered by drip irrigation and has done well, putting on lots of new leaves and looking healthy as can be. That is, until several days ago when it began...
view the full question and answer

Possible woodpecker damage in Monterrey Oaks
November 17, 2006 - I live in NW Austin and have two Monterey Oak trees, each about 30 - 45 gal in size. They both were planted approximately 9 months ago. Both trees seem to have some cracking bark on the trunk along w...
view the full question and answer

Need a tree to grow on the south shore of Long Island, NY
May 29, 2010 - I live on the south shore of Long Island NY. My property is directly on Great South Bay and consists of sandy soil and beach grasses. I am wondering what trees would do well in this type of environm...
view the full question and answer

Hiring a landscaper in New Jersey
July 28, 2008 - Soon I will be hiring a landscaper to plant a privacy line of arborvitaes with a 1' retention wall and I need some help on prices. The quote I was given, which included 48 arborvitaes (and I will ac...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.