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
1 rating

Monday - December 24, 2012

From: Round Rock, TX
Region: Southwest
Topic: Diseases and Disorders, Trees
Title: Will damage to live oak root make it more susceptible to oak wilt
Answered by: Nan Hampton

QUESTION:

Hi. I knicked the root of a live oak when digging. Will this hurt the tree and make it more succeptible to wilt? Is there something I can use to protect the exposed part of the root and make it less likely to turn into a problem? We don't have oak wilt in our neighborhood but I'm still nervous. I didn't realize the root was so shallow.

ANSWER:

If you read the Pruning Guidelines for Prevention on the TexasOakWilt.org page, you will see that most of the infection by the oak wilt fungus (Ceratocystis fagacearum) occurs through the interconnected root systems of the trees.   Since you don't have oak wilt in your neighborhood, it is unlikely that your tree will contract the fungus that way.  It is true that Nitidulid beetles can carry the fungus from an infected tree into wounds on other oak trees.  However, the period that beetles are active is spring—defined by the arborists studying the disease as February 1 through June 30.  The experts do recommend painting any wound with wound dressing or latex paint.  However, the recommendations that I have seen say that for the dressing to be effective, it must be applied immediately.  The sap at the site of the wound attracts the beetles, but if painted immediately the beetles are less likely to arrive in time to land at the site and leave fungus spores.  The wound on the tree is susceptible for about 3 to 4 days if left unpainted, but after that time is not likely to be contaminated.  For more information you can read To Paint or Not to Paint, That is the Question.

Since there is no oak wilt in your neighborhood and the nicking of the root occurred in December, I think it is very unlikely that your oak is going to be infected by oak wilt in the immediate future.  It would be a good idea for you to visit the Caring for Your Oaks page on the TexasOakWilt. org page.

 

More Diseases and Disorders Questions

Ruffly foliage on native lantana
November 05, 2013 - A native lantana in my front yard has developed ruffly foliage on one stem. It looks like miniature broccoli. What can this be?
view the full question and answer

Leaves on 3 year old maple turning brown in Lebo, KS.
July 16, 2011 - Hello, one of our five Maple trees which is is 3 yrs. old now, we saw a week ago that the leaves started turning brown and dropping. My question is: Will the tree survive this and return healthy next ...
view the full question and answer

Yellowing leaves on yaupon in Ft. Worth
April 23, 2009 - I planted a Pride of Houston Yaupon Holly in January in full sun. It is blooming little white flowers right now for spring, but a lot of leaves are turning yellow. Do you know what is causing this? ...
view the full question and answer

Yellow in pin oak leaves from Allen TX
May 25, 2012 - I have two pin oaks and one is completely yellow - a sign of iron deficiency and the other is starting to turn completely yellow as well. I've a proposal for iron deficiency but it is quite expensiv...
view the full question and answer

Care of Ecuadorian penco century plant
December 17, 2007 - I was recently given a Penco, Century plant from Ecuador. It doesn't seem to be doing well. Two of the leaves have turned dark, then yellow, and died completely. Five remain, one seems to be dying as...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center