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 - October 03, 2013

From: Dripping Springs, TX
Region: Southwest
Topic: Butterfly Gardens, Pests
Title: Native nightshade that is a host to hornworm-hawk's eye moth
Answered by: Nan Hampton

QUESTION:

Is there a native nightshade that serves as a host to tomato hornworm/hawks eye moth? I like the moth and as a gardener do not like the hornworm. I would like to have a patch of not terribly toxic nightshades to which I could relocate the hornworms.

ANSWER:

There are other Solanaceae that the hornworm will feed on—e.g., pepper, eggplant and potato.  However, you probably aren't going to be happy about these plants being eaten either. There are native plants that you can encourage to grow near your garden that the caterpillars can be transferred to.  They will feed on Solanum elaeagnifolium (Silverleaf nightshade) and Solanum dimidiatum (Western horsenettle), common native plants that grow in Hays County.  They are considered toxic, however.  See the information from Texas A&M AgriLife's Plants of Texas Rangelands about silverleaf nightshade.  They will also feed on Datura wrightii (Sacred thorn-apple) but it is considered highly toxic.

You do realize that if you transfer the caterpillars to other plants to feed and mature, the resulting moths will lay eggs on your tomatoes again next year and you will have still more caterpillars to deal with.

Here is information from SF Gate about the hornworm and controlling it.  

 

From the Image Gallery


Silverleaf nightshade
Solanum elaeagnifolium

Western horsenettle
Solanum dimidiatum

Sacred thorn-apple
Datura wrightii

More Pests Questions

Organic means for ridding garden of stinging ants
April 18, 2008 - Dear Mr. Smarty Pants, I have a butterfly garden that is filled with native plants the butterflies LOVE! However I have a colony of red ants that have moved in. I need to trim some of the more inva...
view the full question and answer

Dandelions in bluebonnets in Bastrop TX
May 31, 2012 - I have a 20'x60' front yard area where I planted bluebonnets. It has become horrifically inundated with dandelions. How do I eradicate the dandelions while preserving the bluebonnets ? Thanks ...
view the full question and answer

Cupressaceae dying in Suffolk Co.NY
October 20, 2012 - I have noticed that all of my Cupressaceae (& others I see in my area) are dying. They turn yellow, then rust & brown til they are everbrowns. what is going on?
view the full question and answer

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

Tiny red bugs on Mountain Laurel from San Antonio TX
April 02, 2014 - Hordes of solid bright red tiny bugs are all over the bark of my Mountain Laurels. The infestation has me very worried. How can I deal with them? Thank you in advance for helping solve this problem.
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