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

Friday - November 08, 2013

From: Austin, TX
Region: Southwest
Topic: Pests, Shrubs
Title: Something damages leaves on Tecoma stans from Austin
Answered by: Barbara Medford

QUESTION:

Help! Something is chomping my Esperanzas. I thought it was deer but they don't seem to be eating other yellow bells in my neighborhood. I think it's an insect. Something is completely stripping the branches, leaves and blooms. Some of the branches seem to be turning black on the tips. I just sprayed with some mild soapy water hoping that would help. Thanks!

ANSWER:

According to this article from Butterflies and Moths of North America, Tecoma stans (Yellow bells) is a larval host for Paratreae plebeja, Plebeian Sphinx Moth. From that article:

"Life History: Caterpillars hide on the underside of stems during the day, and emerge to feed at night. Fully-grown caterpillars pupate in chambers in soft soil. Caterpillars of the second brood pupate and overwinter in their chambers.
Flight: One brood in the north from May-July, at least two broods in the south from March-November."

It would appear that if you have them this year, you will have them next year, so if it proves to be the case that caterpillars are causing the damage, please see this article from Home Guides on How to Get Rid of Caterpillars without Pesticides on Plants.
In an article from Arizona State University,we found this information about pests on Yellow Bells:

"Disease and pests: In the Phoenix area, Texas and phytophthora root rot fungi occasionally cause sudden plant death, usually only in heavy soils with a former agricultural use history. During late summer of good monsoon years, a leaf skeletonizer catepillar will ravage foliage on upper stems primarily. The damage to foliage is short lived and cosmetic, not lethal. Several chemical control strategies are available including a biological spray Bacillus thurengensis; however, given the growth habit of Tecoma and its rapid recovery after pruning, I recommend that one strongly head back (prune) infested plants and dispose of the damaged material.."
Since this plant is deciduous, we tend to agree that knocking down the caterpillars and trimming back damaged foliage will be sufficient, but you should carefully clean up and dispose of the cuttings and be aware you may be subject to a second attack next Spring.
 

From the Image Gallery


Yellow bells
Tecoma stans

Yellow bells
Tecoma stans

Yellow bells
Tecoma stans

More Shrubs Questions

Privacy screen shrubs for Butler PA
August 09, 2013 - Here is what I want in a bush: native to Western Pa.(Southern Butler County), appropriate for a horse pasture,fast growing, not too aggressive (I will mow around it regularly and can prune occasionall...
view the full question and answer

Juniperus Toxic to Pets?
October 15, 2013 - Are blue rug juniper plants toxic to dogs?
view the full question and answer

Prairie wattle for woodland area in Austin
November 29, 2009 - Can prairie wattle be grown in a woodland area? It would get part shade, with full sun for at least half a day. The soil is a bit rocky; location is Austin.
view the full question and answer

Pruning a rough-leaf dogwood in spring
May 04, 2012 - Is it OK to trim a rough leaf dogwood now? Should I spray after trimming? Thanks
view the full question and answer

Landscaping trees and shrubs non-toxic to dogs from Monticello FL
March 08, 2013 - We're landscaping and need advice on large and small evergreen trees and shrubs that are native to or will flourish in North Florida. We plan to put in a treeline (large and semi-large trees) as wel...
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