Explore Plants

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
    
 

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 Pests Questions

Problems with mountain laurel from Sunrise Beach TX
August 29, 2012 - In Llano Co., TX near lake LBJ, crushed granite type soil - my 4 - 5 year old TX Mtn. Laurels (2), about the size of large wheel barrows, are turning very pale, dropping leaves and on 1 the seed pods ...
view the full question and answer

Tree with brown spots on leaves containing caterpillars
July 14, 2011 - We have a new little tree we planted in our yard and I went over to admire it and on each leaf there is a brown spot in which little worms are living. They are alive and moving around in the pocket th...
view the full question and answer

Possible sawflies on loblolly pine (Pinus taeda)
May 03, 2011 - My pine trees looked great a week ago, now one from top to bottom is almost without needles. It is covered with greenish caterpillars. They have several stripes down their back . Could these be saw fl...
view the full question and answer

Do white-tailed deer consume King Ranch bluestem?
October 25, 2013 - Will white-tail deer in central Texas consume King Ranch bluestem ?
view the full question and answer

Getting rid of Aphids on Asclepias plants in Brea, CA.
July 23, 2012 - I grow asclepsias or MILKWEED for the benefit of Monarchs. At times I have aphids consuming the leaves. How can I destroy the aphids without harming the Monarch eggs? Thank you very much.
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.