Rent Shop Volunteer Join

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

Saturday - July 04, 2009

From: Austin, TX
Region: Southwest
Topic: Pests, Trees
Title: Tree leaves being chewed in Austin
Answered by: Barbara Medford

QUESTION:

We planted a Texas Redbud tree, and Monterey Oak (Mexican White Oak) in the front yard this spring and both have had their leaves eaten or chewed by something I cannot find on their leaves. At first I thought the insects might have been moth or butterfly larvae related, but there is no residue or clue left behind to suggest that theory. Also, our non-bearing fruit trees in the backyard have had their new leaves chewed up. Do you know of any insects that have proliferated this spring and summer?; is there a leaf treatment to prevent this constant feeding by these phantom insects?

ANSWER:

Cercis canadensis var. texensis (Texas redbud) and Quercus polymorpha (netleaf white oak), also known by the common name Monterrey Oak, are both native to Texas and good choices for Austin. However, insects don't care much about where a tree came from.

This Iowa State University Extension website Sustainable Urban Landscapes gives an excellent analysis of Diagnosing the Problem with pictures of the symptoms a tree might exhibit. Holes or chewed edges on the leaves of outdoor plants are generally caused by grasshoppers, crickets or caterpillars. We realize you have not seen the insects, but crickets and grasshoppers would certainly be candidates for hit and run charges. Another possibility, although we feel you would have noticed this, too, is the leafcutter ant. Please read this previous Mr. Smarty Plants answer which goes into considerable detail on this little creature.

From Top Turf, we found this website Insect Damage with some good pictures of insects and the damage they do to leaves. 

In the final analysis, we are gardeners, not entomologists. We are sure you realize that in the very difficult summer we are having in Austin, with drought and record heat, conditions are probably not normal. Insects that might ordinarily not disturb you could be forced to invade your trees. The trees could themselves be demonstrating stress with the leaf damage. The people at the Travis County Extension Office are more likely to have up to the minute information on what is damaging plants in the area, as well as something to do about it. The website we have linked you to has contact information, and may, indeed, have information on the site itself on what is chewing on trees this season.

 

From the Image Gallery


Texas redbud
Cercis canadensis var. texensis

Mexican white oak
Quercus polymorpha

More Trees Questions

Swarming insects on non-native willow in Washington PA
September 25, 2011 - I have had a very large, beautiful pillow willow bush/tree growing next to our garage for about 8 years. Last year at the end of August, it began to attract white-faced hornets and yellow jackets by t...
view the full question and answer

Propagating Magnolia grandiflora from Murfreesboro TN
August 03, 2011 - There are several Magnolia grandiflora (Southern magnolia) that have been planted in my neighborhood in middle Tennessee by a landscaping company, and now that they all appear to be producing seeds, ...
view the full question and answer

Newly planted nuttall oaks from Houston TX
November 16, 2012 - I recently purchased two Nuttall Oak Trees in Houston Texas (October). They are both 15' or taller. I planted them within 24 hours of being delivered, watered them in, staked them, and within 3-4 d...
view the full question and answer

What will grow under a magnolia in Houston?
May 21, 2010 - What will grow under a magnolia tree in Houston? The area is shade and partly sunny.
view the full question and answer

Is the fruit on Texas olive (Cordia boissieri) edible?
October 17, 2010 - I planted Cordia boissieri (Texas olive) in my garden and its thriving. Now I'm getting fruit from the tree; they are grape-sized waxy and soft. Is this fruit edible (by humans)? Should it be ...
view the full question and answer

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