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

Friday - September 20, 2013

From: Dripping Springs, TX
Region: Southwest
Topic: Diseases and Disorders, Pests
Title: Berry-looking parasites on live oak leaves
Answered by: Nan Hampton

QUESTION:

Dripping Springs TX Live oaks. What are these berry looking parasites on my tree's leaves. As many as 4 1/4 in berries per leaf. I have 3 acres with dozens of liveoaks all having them on the leaves

ANSWER:

They are galls caused by the trees reaction to insects laying their eggs in the leaves. The tree's tissues expand and grow around the developing egg and the resulting larvae that feeds on the plant tissue before emerging as an adult.  The galls may not be aesthetically attractive but they are not especially deleterious to the trees.  There is really no way to "treat" them since the insect is safely ensconced within the gall and won't be reached by any insecticide.  Here are some articles related to galls from Texas A&M Texas Plant Disease Diagnostic Lab and from Texas A&M AgriLife Extension.  Here are photos of oak leaf galls caused by Belonocnema tratae and more photos of oak galls from the Central Texas Gardener blog.

 

More Pests Questions

Galls on live oak tree in Austin
December 12, 2013 - I live in Austin, and have a 13 year old live oak in my yard. It has developed little spheres, kind of like green peas, on the underside of the leaves. What is it? Is it harmful? Is there somethin...
view the full question and answer

Is oak leucanium an invasive species in Texas from Laredo TX
April 02, 2013 - Is Parthenolecanium quercifex considered an invasive species in Texas? Does this insect attach itself to redbuds? I spotted and removed from my small 5ft Texas Redbud last year. It seems that it has ...
view the full question and answer

Ants in the compost pile from Georgetown TX
March 09, 2012 - Can you give me any suggestions for ridding my compost pile of ants?
view the full question and answer

Problem with leaves of Texas Ash in Austin
May 21, 2012 - 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 thi...
view the full question and answer

Squirrels eating seed pods of Rock Rose in Austin
June 24, 2011 - Squirrel(s) have been ripping the branches off my rock rose bushes in order to eat the seed pods. Previously we had problems with squirrel(s) gnawing on our garden ornaments. I sprayed the ornaments ...
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
© 2014 Lady Bird Johnson Wildflower Center