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

Tuesday - April 02, 2013

From: Laredo, TX
Region: Southwest
Topic: Pests, Trees
Title: Is oak leucanium an invasive species in Texas from Laredo TX
Answered by: Barbara Medford

QUESTION:

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 affected it this spring with no blooms, no leaves on the main top part of tree. Is there anything I can do to save my tree?

ANSWER:

We have to be honest, we are gardeners, not entomologists, and we never heard of this before, but we will see what we can find out.

On the website Invasive.org, we found this statement:

On that website, we found this page on Parthenolecanium quercifex. It was referred to on that page as "oak lecanium." So, we searched for something by that name and got this site: Biocyclopedia Oak lecanium scale. According to this article, is mostly a problem on oaks; thus the name. From that article: "Other reported hosts include other oak species, sycamore, pecan, chestnut, birch, persimmon, and pricklyash."

In answer to your question: Is this bug invasive? Of course, it is. Is that what's causing problems on your Cercis canadensis var. texensis (Texas redbud)? We didn't find it mentioned in any of our research. This USDA Plant Profile Map does not show Texas redbud growing in Webb County, so there might be an environmental problem.

Since we are not entomologists, we suggest you contact the Texas A&M AgriLIFE Extension Office for Webb County. If something is going on with that bug in your area, they should know about it.

 

From the Image Gallery


Texas redbud
Cercis canadensis var. texensis

More Pests Questions

Caterpillars on Mountain Laurel from Austin
July 25, 2013 - My 1-yr old mountain laurel has been decimated by small yellow and black catepillars. It recovered a bit and pushed out some fresh new growth, and more came and decimated that too. Are these caterpi...
view the full question and answer

Insects on non-native euonymus in Lake Orion MI
June 23, 2010 - I had a greenlane euonymus that had a few flies last year but was infested with thousands this year. We ripped it out, it was an 8 year old plant. Do you know why they are attracted to it now?
view the full question and answer

Small white bugs on indoor hibiscus in Ohio
November 25, 2008 - My Hibiscus has small white bugs on the leaves with small white residue. Looks like very small pieces of white rice. This white rice is also covering the UNOPENED buds and making them fall off. It ...
view the full question and answer

Care of butternut trees (Juglans cinerea) with bumpy growths
June 12, 2007 - I have two small butternuts, around 3-4 feet. One has developed very 'bumpy' reddish growths on the leaves that are actually stunting their growth. What do you think it is and what can i do to sto...
view the full question and answer

Clicking heard under an Oak in near Bandera, TX
May 06, 2014 - Hi, I live on a ranch in TX outside of Bandera. We're covered with live oaks, spanish oak and cedar. Last week,as I stood under an oak, I heard a constant fairly loud clicking sound under and around ...
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