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

Monday - May 21, 2012

From: Austin, TX
Region: Southwest
Topic: Pests, Trees
Title: Problem with leaves of Texas Ash in Austin
Answered by: Barbara Medford

QUESTION:

We purchased a 3' to 4' Texas Ash in March 2012. The past few days I noticed new leaves at the top are curled under, have a milky substance on them, and more than a few ladybugs on them. What is this? What do I do?

ANSWER:

According to this USDA Plant Profile Map, Fraxinus texensis (Texas ash) is native to Travis County so we can strike that as a problem. We went to a website from Iowa State University Extension on Common Problems of Ash Trees. There were some pretty scary things, like Emerald Ash Borer, mentioned, but we think No. 19 holds the key:

"19. Leafcurl ash aphids feed on leaflets as they expand in the spring. The insect’s body is covered in white, waxy strands. Feeding causes leaflets to twist and curl. In addition, aphids secrete clear, sticky honeydew, which can speckle anything under the tree. Natural enemies usually control the aphids."

When you mentioned aphids, accompanied by ladybugs, that gave us the first clue. And the good news is, ladybugs are sworn foes of aphids. They are definitely one of the natural enemies that usually control aphids.

From a website called You Grow Girl we found this article Good Bugs, Bad Bugs: Ladybug vs. Aphid. We suggest you don't treat the problem at all, the ladybugs are handling it.

 

From the Image Gallery


Texas ash
Fraxinus albicans

Texas ash
Fraxinus albicans

Texas ash
Fraxinus albicans

More Trees Questions

Deciduous tree with tap root
August 04, 2008 - I have a 13 foot space between two town houses and would like to plant a slender deciduous tree up to 30 feet in height with a tendency to tap root so as not to disturb the foundation of the houses. ...
view the full question and answer

Trees for cutout in driveway in Houston
November 12, 2010 - I live in central Houston. I have a new driveway with a cutout of 4' x 8'. I would like to plant a shade tree that will not break up the concrete. What do you recommend?
view the full question and answer

Companion plants for Douglas fir in Federal Way, WA
May 11, 2009 - What are good companion plants for large Douglas Fir trees? we have 5 large trees in our cul-de-sac "island" and would like to plant something colorful around the trees. It's very dry, shady, and c...
view the full question and answer

Native landscaping plants for Sherman, Texas
December 19, 2007 - We are starting from scratch on landscaping our new yard. We live in Sherman, TX and I would like to use plants and flowers that are native to Texas and have a good chance of surviving. What are you...
view the full question and answer

Is December a good time to prune oaks in Central Texas?
December 29, 2010 - Given that we haven't had much cold weather here in central Texas (Wimberley) this season, is it a good time to trim live and Spanish oak trees (damaged limbs and low hanging branches and suckers)? ...
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