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

Black bugs on yucca from Aledo TX
April 14, 2013 - We have flowering yuccas that have thousands of small black bugs that seem to be hurting the plant. They are not on any other foliage in our beds. What do I use to get rid of them??
view the full question and answer

Pest damage to Yaupon shrubs in Austin, TX
September 18, 2011 - I have noticed pest damage in our 4 ft. yaupon. There are circular holes eaten on 90% of the leaf growth. Trunk & branches look untouched and healthy. Could this be leafminers? How can I care for it?...
view the full question and answer

Tip Dieback on Lonicera sempervirens
August 14, 2013 - I have a Lonicera sempervirens (coral honeysuckle) vine in Virginia which does well early in the season, but then around July, the very tips of its shoots (just the last 1-2 inches) wither, turn black...
view the full question and answer

Waxy deposits on Magnolia fuscata from Ethel LA
June 18, 2013 - I have a 4yr old Magnolia Fascata (aka banana shrub)- I noticed that it has small oval shaped yellow waxy deposits on the branches.. I have also noticed small black ants on the branches. The unknown d...
view the full question and answer

Plants ants avoid from McAllen TX
May 22, 2010 - Which native plants do ANTS avoid (are there?)? We have a big ant problem here. Thanks!
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