Native Plants

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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

rate this answer

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
More Shrubs Questions
Finding a manzanita species suitable for Fort Worth, TX
April 28, 2015 - Which manzanita shrub would thrive best in the Fort Worth, Tx. area? I was thinking of planting it in a large pot. Thank You!
view the full question and answer
Toxic trees and shrubs in Pennsylvania
September 30, 2008 - I have a long property edge that I have been gradually transforming from a former cattle pasture into a hedgerow of native trees and shrubs. Cattle still graze on the other side. Are there any toxic...
view the full question and answer
Evergreen shrub with flowers Alabama
May 21, 2008 - I am looking for an evergreen plant, shrub or the likeness that flowers in the spring that can handle hot afternoon sun in Southeast AL. Can you give me some suggestions, if there is such an animal.
view the full question and answer
Sap oozing from trunks of Cherry Laurels in Austin, TX
January 24, 2015 - I have several mature compact cherry laurels whose leaves are beginning to turn yellow. They are in raised beds, have been properly fertilized, have compost spread around them, and are properly water...
view the full question and answer
Mechanism for Cenizo bush blooming before rain
October 04, 2006 - Why does cenizo (aka barometer bush) bloom before it rains?
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |