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

Hybrid Leyland Cypress leaning in Annapolis MC
June 29, 2011 - We have a large, 9-year old Leyland Cypress that has tipped over. It is still green and growing but leaning slightly off center. It's about 20' tall. Should we stake it? If so, we'd like to do ...
view the full question and answer

Patio materials under a native oak trees in Missouri
March 02, 2009 - Is it safe to build a pavestone patio (with gravel sub base, Geo tech 101 fabric and sand bed..around two 50+ year old native oak trees? I know concrete would compact and cause damage to the surface ...
view the full question and answer

Fast growing non-invasive flowering tree from Carlsbad CA
April 17, 2013 - Looking for fast growing flowering tree with non-invasive roots.
view the full question and answer

Bracket fungus on live oaks
October 04, 2007 - I live in Cedar Park and the house we just bought has 4 native live oaks growing in the front yard. On two of the live oaks there are bracket fungi growing at their base. Each tree just produced two n...
view the full question and answer

Brown spots on native oak trees
June 16, 2015 - Hi, My native live oak trees are declining. The leaves have small brown spots that increase in size until the leaf dies and falls off, then the branch and then the entire limb. I have not watered the...
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 | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center