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?


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

Monday - June 09, 2008

From: Temple, TX
Region: Southwest
Topic: Non-Natives, Pests, Trees
Title: Secretions of fluid from crepe myrtles
Answered by: Barbara Medford


On my crepe myrtle tree I have dozens of 1/2-inch-long narrow bugs that seem to secrete tiny drops of fluid. They appear on the branches of the tree. Are these harmful to the tree? Do I need to do anything about this? I live in Temple, TX


It is most likely the offending insects are aphids, as described in this article from the University of California Integrated Pest Management. They vary somewhat is size and appearance, but they all suck liquids out of the plant and secrete it again, usually causing a fungus called sooty mold to appear. They attack many different plants but they really love crape myrtles. Since this problem comes up about this time every year, see this previous answer with the information you are looking for.


More Non-Natives Questions

Source for non-native Crown of Thorns from Bulverde TX
May 04, 2013 - Can you please tell me where I can buy a Crown of Thorns plant in or near Bulverde, Tx.
view the full question and answer

Want to Grow Herbs in Pots on Balcony
November 26, 2011 - Nov. 20, 2011 I live in a large apartment with a front balcony. I was wondering what would grow well in pots and fresh herb this time of the year? And will lavendar work for a hanging plant as well...
view the full question and answer

Seeds of agave attenuata from San Diego CA
April 16, 2012 - After the agave attenuata bloom dried up there are seeds like thing hanging on the foxtail; do I leave it until it dies or do I chop that down. Are those seeds for propagation. The leaves of the plan...
view the full question and answer

Non-native Norfolk Pine suffering in Corpus Christi TX
August 02, 2011 - About ten yrs. ago I transplanted my Norfolk Pine into the ground in my backyard. With all the frosty weather of 2010/2011 the Spring brought a browning/dying of a lot of the Norfolk Pines in this are...
view the full question and answer

Damage to ruellia in Monroe LA
October 26, 2009 - I have hundreds of Ruellia Brittoniana. Dwarf Katie White, Katie Blue and Katie Pink. I am finding holes in some of the leaves, Some just have notches chewed out of them. Some of the leaves have...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2015 Lady Bird Johnson Wildflower Center