En Español

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

Tuesday - October 27, 2009

From: Wimberley, TX
Region: Southwest
Topic: Trees
Title: Twig girdlers attacking an Elm tree in Wimberly, TX.
Answered by: Jimmy Mills

QUESTION:

I was looking at my small 6' cedar elm and noticed that four (4) 1/2" limbs have circle cuts a 1/8" wide completely around them and they are dead. Is this some insect or maybe a bigger critter? I have several other cedar elms and they are not affected.

ANSWER:

 It sounds like your elm tree has been visited by a twig girdler, a type wood-boring beetle. Texas Agricultural Extension Service of Texas A&M University has an excellent publication, Wood Boring Insects of Trees and Shrubs , with information to help identify your particular pest and how to control it.

Other useful sources of information can be found at:

Texas Agricultural Extension Service

University of Nebraska Extension

Check this site for some good beetle images

 

 

More Trees Questions

Live oak trees buzzing in Taylor TX
October 20, 2012 - Is it possible for live oak trees to make a buzzing sound? We have heard this sound under our live oak and were worried it was bees but we don't seem to see any. I also heard the buzzing under my mot...
view the full question and answer

White pine insect problems
October 08, 2009 - We live in The Woodlands TX. Some of our large pine trees have leaking sap and one is dead. What can we do to save the one's still alive?
view the full question and answer

Native Trees for Pflugerville TX
September 28, 2013 - I'm looking for suggestions on native, drought tolerant conifers that can be located in a Pflugerville landscape under overhead electric lines. Open to Arizona Cypress, but concerned about the height...
view the full question and answer

Fast growing, flowering shade tree for Austin
April 28, 2012 - Sister just moved to Austin Texas. She is looking for fast growing shade trees, preferably one with nice flowers. Any suggestions?
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

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center