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 - September 21, 2006

From: Midland, TX
Region: Southwest
Topic: Vines
Title: Control methods for Tribulus terrestris, Goatheads or Puncturevine
Answered by: Joe Marcus and Nan Hampton

QUESTION:

We have some land that has so many goatheads we can't do anything with it. We would like to know what if anything will remove them from our place. There has to be something out there that will kill these goatheads out. REALLY BAD HERE. Thank you.

ANSWER:

Goathead (aka Puncturevine), Tribulus terrestris is a pernicious weedy introduction from Europe which now has nearly global distribution. It is a member of the Caltrop family, Zygophyllaceae. Both the common family name, Caltrop, and the genus name, Tribulus, refer to a particularly wicked iron weapon of ancient origin known as a caltrop used to incapacitate horses, other war animals and foot soldiers.

Puncturevine prefers and thrives in disturbed soils, especially over-grazed land. Improved land management is often the first and best step to take in controlling the weed. An annual plant, it does not compete well with other plants, especially turf grasses. If overgrazing or missing, groundcovering plants are not the issue on your land, there are other control strategies available.

If the amount of land affected is small, removal by hand is probably your best control method. It is best to remove the young plants by hand-pulling, hoeing or tilling before they go to seed. Since your plants are already producing seeds, you should pull, hoe or chop out the existing plants, rake or sweep up the spiney fruits, go over the soil with a piece of scrap carpet, rug or other nappy cloth and burn everything you pick up.

Other control methods include the use of introduced weevils and burning with propane torches. Both methods will likely yield much less than complete control, but may make sense if you're dealing with large acreage. Your county agricultural extension service agent may also be able to help as others in your area are dealing with the same pest.

Finally, we are including some links here for much more information about Goatheads:
Texas A&M's Toxic Plant Database
The UC Davis, IPM Online website
The Washington State Noxious Weed Control Board website
The California Department of Food and Agriculture Weed Information website
The North Dakota Department of Agriculture Invasive Species Manual
 

More Vines Questions

Groundcover Under Maple Tree in Ottawa That Takes Foot Traffic
April 19, 2013 - Hi, I am looking for a groundcover to put under a large maple tree that will be alright for kids to run about on and will be happy in the Ottawa climate. Your other answers to similar questions have b...
view the full question and answer

Smarty Plants on hyacinth bean vine
July 01, 2005 - I'm looking for what I believe is a wild vine. All i know is that it has purplish colored beans and the flowers are also purple. Also the vine itself is purplish. i believe that the vine is either fro...
view the full question and answer

Transplanting trumpet creeper in Prairie City, IA
August 22, 2011 - I have a Trumpet Creeper that I would like to transplant. How do you do that?
view the full question and answer

A Bounty of Edibles for New Braunfels Texas
October 25, 2013 - I was hoping you could suggest a few plants that would serve several purposes. I live in New Braunfels, TX and would like to incorporate as many drought tolerant plants which would support birds, but...
view the full question and answer

Opinion of 5 best native garden plants in Oklahoma from Burneyville OK
September 07, 2013 - What would you say are the 3 to 5 BEST native garden plants for south central Oklahoma?
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