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

Wednesday - December 12, 2007

From: Austin, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Determine oak wilt in red oaks
Answered by: Candace Fountoulakis

QUESTION:

I am concerned my red oaks have oak wilt. How can I tell what is wrong with them?

ANSWER:

Determining if oak wilt has been contracted by a red oak starts with looking at the tree while leaves are still present to see if any areas have turned brown or put on fall color before they should have, the presence of dead leaves on a single branch or if young green leaves have wilted or fallen off.  Red oaks that are infected with the oak wilt fungus will die rather quickly. A professional evaluation of the tree on site where a sample from the trunk can be taken would be advisable. A lab analysis will determine if oak wilt is present. If the tree has been killed by the fungus, it should be cut down and the wood removed, not stored. The fungus can live on under the bark and created a new generation of spores in the spring from mats under the bark. This will cause the disease to spread to other trees when beetles are present as well. 

Please visit the website www.texasoakwilt.org to see photos of diseased leaves, vendor lists and other helpful information about determining the health of your oaks. Other diseases of trees cause similar symptoms that may not be fatal to your red oaks, so a professional certified arborist is your most reliable resource to determine what is wrong with your trees. I have attached a link to our plant database on Shumard red oaks, as well as an image from our gallery.

 Quercus shumardii (Shumard's oak)

 

From the Image Gallery


Shumard oak
Quercus shumardii

More Diseases and Disorders Questions

Watering Houseplants with Soapy Water
August 22, 2011 - I accidentally watered my house plants with a container that had a some dishsoap in it. Will they be okay? One of the plants is a 20yr old cactus, with small roots.
view the full question and answer

Problems with Copper Canyon Daisy from Austin
June 08, 2014 - We had 3 copper canyon daisies. Two of them bloomed profusely last year, but only one has come back this spring. We cut them all back as instructed. When it was clear that two were not coming back, we...
view the full question and answer

Apparent disease in peach tree in Austin
June 12, 2008 - I have a peach tree that the leaves are "bleeding" out on. The leaves are continuing to get paler and paler. There are no peaches on the tree this year either. What can I do?
view the full question and answer

Waxy deposits on Magnolia fuscata from Ethel LA
June 18, 2013 - I have a 4yr old Magnolia Fascata (aka banana shrub)- I noticed that it has small oval shaped yellow waxy deposits on the branches.. I have also noticed small black ants on the branches. The unknown d...
view the full question and answer

Chipmunk in the garden.
August 27, 2008 - Hi Mr. Smarty Plants, I have a rogue chipmunk this year (never had one before doing this) who is eating roots and digging holes in all my plant containers. I have tried Plant Skyd (excellent deer r...
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