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

Thursday - July 05, 2012

From: Spicewood,, TX
Region: Southwest
Topic: Diseases and Disorders, Pests, Shrubs, Trees
Title: Texas Mountain Laurel oozing sap in Spicewood, TX.
Answered by: Joe Marcus

QUESTION:

We have a Texas mountain laurel that seems to be sweating. Oozing sap with no apparent signs of any type of bore holes, or holes made from any birds.

ANSWER:

Your Texas Mountain Laurel has likely been visited by some egg-laying insects.  Cicadas and Katydids are common causes of sap-oozing on trees and shrubs during the summer months.  Females of many of these insects have very sharp, sword-shaped appendages called ovipositors with which they pierce the surface of tree trunks and stems and lay their eggs beneath.  This piercing leaves a razor-thin wound in the bark of the plant that is nearly invisible, but through which sometimes copious amounts of sap may ooze.

Most plants have little ill-effect from being violated in this way.  However, large-scale ovipositing by some insect species can harm or even kill some plants.

Contact your AgriLife Extension Service agent for more information on this topic.

 

From the Image Gallery


Texas mountain laurel
Sophora secundiflora

More Trees Questions

Planting fruit and nut trees in Archer, FL.
January 26, 2012 - We're looking to plant a few fruit and nut trees in Archer, Florida. We've been thinking about figs, apples, peaches, oranges, plums, and whatever nuts grow best here (looks like almonds and pecan...
view the full question and answer

Identification of pines on I35 between Dallas and Denton
May 03, 2011 - I frequently drive I-35E from Dallas up to Denton and I've often wondered if the pine trees that I see near the road and in the surrounding areas, especially between Lewisville and Denton, have been ...
view the full question and answer

Evergreen trees for Long Island, NY
September 20, 2007 - I live on across from the water on the north shore of Long Island. I would like the names of some hardy trees that are both native to Long Island and also NOT deciduous! I am finding it easy to find...
view the full question and answer

Toxicity of catalpa wood?
June 05, 2012 - Is the sawdust from cutting up a catalpa tree or the smoke from burning the wood toxic? Thank you,
view the full question and answer

Apples, pears and geraniums in Kipling, Saskatchewan
March 30, 2013 - My geranium's leaves became yellow - Why? Where can I buy a good nice apple tree? Will apples and pears grow in south Saskatchewan?
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