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 - 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 you

ANSWER:

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


Texas mountain laurel
Sophora secundiflora

Texas mountain laurel
Sophora secundiflora

Texas mountain laurel
Sophora secundiflora

More Trees Questions

Transplanting aspens and Colorado blue spruce trees
August 18, 2009 - Please help me with info on transplanting aspen and blue spruce trees in Colorado. I live at 8600ft and have tons of deer. thx
view the full question and answer

Tree to plant by pool replacing mulberry in Las Vegas
January 18, 2009 - I am looking for a tree to plant between my house and pool. We just cut down a mulberry that was here due to its invasive root system. Are there any plants that can tolerate Vegas weather, provide a...
view the full question and answer

Transplant shock in pecan tree in Garner NC
July 19, 2012 - I transplanted a pecan tree about 3 weeks ago & been watering it 3 times a day. The leaves are turning brown & crumbly before I water it. After I water it, the leaves are brown but I can scratch the t...
view the full question and answer

Feeding live oak and redbud trees from Fredericksburg TX
October 23, 2012 - Can you please tell me what to feed my live oak and texas redbud trees that survived the drought? We have granite soil.
view the full question and answer

Best time to trim oak trees to avoid oak wilt
June 08, 2008 - When is the best time to trim oak trees? Concerned regarding oak wilt if cut at wrong time. Ball moss is not harmful but will it help or harm if trees trimmed. These are large oak trees. Thank you.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center