Native Plants
![](../_images/smarty_plants.gif)
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.
![](../_images/mr_smarty_plants_logo_web_200w.jpg)
rate this answer
![](../_images/star_00.gif)
Thursday - March 15, 2012
From: Driftwood, TX
Region: Southwest
Topic: Pests, Trees
Title: Moths around Sophora secundiflora from Driftwood TX
Answered by: Barbara Medford
QUESTION:
Sophora secundiflora Our Mountain Laurel has a lot of large moths flying around it. Should we be concerned? Will they hurt the tree? thank youANSWER:
We thought we were looking for moths as pollinators of Sophora secundiflora (Texas mountain laurel), but we found a USDA Forest Service site on the plant, which included this statement:
"Pests: Plants are primarily pest-free, except for infestations by caterpillars of a moth in the family Pyralidae. Caterpillar infestations of mescalbean sophora have been controlled biologically with a strain of bacteria (Bacillus thuringensis), which causes the caterpillars to sicken and die. Insecticide sprays such as Sevin ordiazinon may also be useful."
Then, we found a previous Mr. Smarty Plants question on the Genista moth:
"Bottom Line: We learned that the Genista is a web producing caterpillar that attacks Texas laurel, crape myrtle, honeysuckle, and Laburnum. Larvae defoliate as well as spin webs. We would appeal to you not to employ pesticides, as they can do much more harm than good to the surrounding vegetation, butterflies, soil and water supply. Whatever is eating your plant, if you would rather not have a chewed-on plant, we suggest you pull it out. There is no point in wasting scarce resources on a plant that is not satisfactory to you."
Our take on this is that if you begin to see caterpillars on your Texas mountain laurel, and you feel they are damaging the plant, then you might consider trying the Bacillus thuringensis treatment as suggested by the USDA Forest Service. Remember that moths are often important pollinators of various plants, so don't spray pesticides on them, but treat only the caterpillars.
From the Image Gallery
More Trees Questions
Evergreen native trees for Austin
January 31, 2009 - Please recommend all evergreen native trees for Austin TX.
view the full question and answer
Native trees for property in Washington State
September 29, 2008 - We bought a piece of property on Lake Wenatchee, Washington. It was cleared more than we would like and want to know what types of trees grow well there and can handle the snow. Should I wait until ...
view the full question and answer
Live oak trees and possible drought stress in Lott, TX.
June 11, 2011 - One of our Live Oak trees is losing leaves in only a portion of it. I have researched Oak Wilt and I am not sure that is what it has. We have trees that are hundreds of years old and was wondering i...
view the full question and answer
Failure to thrive of one Desert Willow in Phoenix AZ
September 06, 2013 - We planted 4 desert willow trees in the summer and 3 of the 4 are doing excellent, however the last one is not not doing so well, it was the smallest of all and it started out fine but its leaves bega...
view the full question and answer
Eco-friendly trees for parks in Brownsville, TX
April 26, 2008 - Which are the best eco friendly trees for parks?
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |