Host an Event Volunteer Join Tickets

Support the plant database you love!

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

Tree with no invasive roots for Los Angeles
July 24, 2011 - I have a large in ground planter sharing the outside wall (on south/east corner) of my house in east LA 90032. I would like to find a tree that grows quite tall (2 story building), but grows roots ver...
view the full question and answer

Identity of flowering yellow trees in Austin
March 21, 2012 - There are numerous flowering yellow trees in my Austin neighborhood. Are they mesquite or goldenball lead trees? They are quite fragrant, like a new bar of soap.
view the full question and answer

A Tree for Infant Daughter in Katy, TX
December 04, 2010 - Mr. Smarty Plants, We would like to plant a tree to "grow with" our infant daughter. We think she will enjoy measuring herself against it year after year, and will feel a sense of pride as we care...
view the full question and answer

Is Black Cherry allelopathic from Austin
May 21, 2010 - Is the Black Cherry an appropriate tree to plant in north Austin as a shade tree? Your site says this tree may be allelopathic to garden plants . Do you know specifically which plants it might help o...
view the full question and answer

Planting Anacacho orchid tree in Llano, TX
October 05, 2011 - Re Bauhinia lunarioides: I'm trying to pick a good site in Llano Co for a 5 gal tree I received as a gift. Your plant database says part shade. The arid zone trees publication you reference in a...
view the full question and answer

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