En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

rate this answer
Not Yet Rated

Wednesday - September 01, 2010

From: Richardson, TX
Region: Southwest
Topic: Pests
Title: Fighting ants and bugs in Richardson TX
Answered by: Barbara Medford


Before my blue fall asters and my Clara Curtis (perennial) mums bloom in a few weeks, what can I do to help prevent the ants and other bugs from eating them to death- so I can enjoy them a bit longer than usual this year? I'm in the DFW area and have 95% Texas natives.


The Clara Curtis perennial chrysanthemum is, we trust, part of the 5% of your garden which is non-native. The genus Chrysanthemum is native to China and Japan, and the name of the mum you are asking about is Chrysanthem x rubellum 'Clara Curtis.'  The "x" indicates that it is a hybrid, which also removes it from native plant status, but we never did find out what the rubellum was, another species of chrysanthemum, we suppose. This article from Perennials.com will give you some information.

We are also assuming that the blue fall asters you are referring to are Symphyotrichum novae-angliae (New England aster), which, indeed, are native to North America and apparently grow in Texas, although they are not listed in our Native Plant Database as being native to Texas.

However, whatever help we can give you with ants and bugs eating your plants will surely apply to both. We extracted this comment from the University of California Integrated Pest Program article on Ants. 

"Inside buildings, household ants feed on sugars, syrups, honey, fruit juice, fats, and meat. Long trails of thousands of ants may lead from nests to food sources, causing considerable concern among building occupants. Outdoors they are attracted to honeydew, produced by soft scales, mealybugs, and aphids. This liquid excrement contains sugars, and other nutrients. Frequently outbreaks of scales and aphids occur when ants tend them for honeydew because the ants protect scales and aphids from their natural enemies."  

Ants are farmers, but they are not vegetarians. They won't eat your plants. There is a leaf cutter ant which carries off chunks of leaves, but we don't think that's what you're talking about. You might be interested in reading this previous Mr. Smarty Plants answer about leaf cutter ants in Texas. You will note from the article above that ants are a symptom of the presence of other bugs that ARE eating your plants. So, what you want to do is deal with those insects: scales, aphids and mealybugs. We will link you to articles on each so you can see what they look like and what suggestions the articles might have for their control.

First and foremost, forget the pesticide sprays. That's overkill, and what it will kill is the beneficials, the butterflies and pollinating bees, the ladybugs and wasps that are the enemies of the bugs that really do harm your plants. Those bugs that we mentioned as being harmful can all be controlled with a gentle spray of water when they are active on the plant. If you're really serious about it, add a little dishwashing liquid to the water in the spray. This will wash off the bugs, their honeydew and the ants that are farming same. Most of the bugs that are washed off cannot climb back up. This is about as low impact a pest solution as we know of.

From University of California Integrated Pest Management Aphids.

Learn 2 Grow All About Mealybugs

University of Missouri Extension Aphids, Scales and Mites on Home Garden and Landscape Plants. 

Pictures of Chrysanthemum x rubellum'Clara Curtis' from Google


From the Image Gallery

New england aster
Symphyotrichum novae-angliae

New england aster
Symphyotrichum novae-angliae

New england aster
Symphyotrichum novae-angliae

New england aster
Symphyotrichum novae-angliae

More Pests Questions

Tip Dieback on Lonicera sempervirens
August 14, 2013 - I have a Lonicera sempervirens (coral honeysuckle) vine in Virginia which does well early in the season, but then around July, the very tips of its shoots (just the last 1-2 inches) wither, turn black...
view the full question and answer

What's causing holes in trunk of white oak tree in SouthBend IN?
June 10, 2013 - We have a huge White Oak in our backyard that is approx. 130 years old. This evening I became aware that there are several small holes around the trunk that appear to be oozing a dark sappy liquid. ...
view the full question and answer

Removing bermudagrass from buffalograss in Smithville TX
May 01, 2013 - I have a lawn created two years ago with buffalo grass sod in Smithville, TX. Recently several areas of bermudagrass have started to flourish in the buffalo grass lawn. Can you recommend a herbicide...
view the full question and answer

Sap drips from Sophora secundiflora
May 30, 2008 - We have an old Mountain Laurel (sophora secundiflora) about 20 ft tall. It blooms pretty well and seems healthy. We are wondering why it drizzles a non-sticky sap in tiny drops. Hold out your hand and...
view the full question and answer

Leaves wrinkling on Tecoma stans from San Antonio TX
August 16, 2013 - My two year old esperanza (planted in the ground) froze back last winter, came back from the roots & has been doing well all summer. Recently one branch has leaves that are nice & green but very wrin...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2016 Lady Bird Johnson Wildflower Center