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

Thursday - December 16, 2010

From: Austin, TX
Region: Southwest
Topic: Pests, Trees
Title: Larvae infesting Mexican white oak
Answered by: Nan Hampton and Eric Beckers

QUESTION:

What larvae/worm would dwell and eat the inside of a Mexican White Oak? I planted one last November and it was doing great. The bark started cracking towards the bottom but the top was very full & green with plenty of new growth. One day I found it had snapped in two at the bottom of the trunk and there were many white larvae worms inside!! I always thought of them as pretty pest resistant. Thoughts? What could it be and how do I treat it? Also, I planted another one in the front yard on the same date. How do I know if it's infested?

ANSWER:

Mr. Smarty Plants consulted Eric Beckers with the Texas Forest Service about the problem with your Quercus polymorpha (Mexican white oak).  We don't know for sure what insects the "many white larvae worms" were; but we do believe that whatever they were (borers, ants, etc.) that they were acting on a previously damaged tree. Newly planted nursery stock are often afflicted with mechanical injuries or sun scald and these minor problems can turn bad when a borer or other insect sets up shop.  Rough handling, bruises, tight wraps/ties, etc., are locations where borers seek entry.  Newly planted trees are all too often damaged by weed whips and mowers and insects take over the nice cavities left behind.  Anyway, the problem is probably restricted to the one tree, unless the other was similarly damaged.  You should carefully inspect the other tree and if you do see damage, you might want to contact a professional arborist.

 

More Trees Questions

Eastern red cedar for indoor Christmas tree
November 06, 2007 - I would love to have a live b&b or container tree for a Christmas tree, then plant it in the ground after Christmas. Would a Eastern Cedar survive if I brought it inside for a couple of weeks before p...
view the full question and answer

Thinning out of maple tree following heavy winds
July 26, 2008 - A 15 yr old red maple lost significant fruit in spring from heavy winds, in summer the tree seems thinned out. Is this the reason? Tree is otherwise very healthy and has always had thick foliage in ...
view the full question and answer

Retention of essential oils by Ashe Juniper wood from Austin
May 03, 2014 - I am looking for information on why local Austin Juniper/Cedar trees are so great at retaining essential oils for aromatherapy. I make pendants for necklaces out of our local fallen cedar trees and ...
view the full question and answer

Dead woody plants in wildlife garden in Austin
March 02, 2011 - I am an enthusiastic and pretty successful wildlife gardener, have studied my Wasowski "Bible", but I can't get any evergreens established in my yard! We live on blackland clay, which I amend with ...
view the full question and answer

Survivors of a Cedar Elm thicket thinning.
April 12, 2013 - I thinned a thicket of cedar elm saplings, but a few are now leaning excessively. Will they straighten up over time or should I go ahead and cut them too? Thanks!!
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