En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Killing mesquite (Prosopis glandulosa) with propane torch

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
1 rating

Thursday - January 14, 2010

From: Cedar Hill, TX
Region: Southwest
Topic: Invasive Plants
Title: Killing mesquite (Prosopis glandulosa) with propane torch
Answered by: Nan Hampton

QUESTION:

Can I kill mesquite with intense fire, such as a 1.2 million BTU propane torch? I know mesquite bounces back from cutting at the soil line. The trees are in Elgin. Thanks

ANSWER:

The US Forest Service describes the effect of fire on Prosopis glandulosa (honey mesquite).  Range fires can reduce the mesquite canopy but usually does not kill them.  Around 90% of the trees survive to resprout from the roots or crowns. The report also shows that using a propane burner at high temperature (>780 degrees F) was successful in killing 100% of young trees (<1.5 years old).  Burning after treating with herbicide (2,4,5-T) resulted in mortality in 24-32% of the trees that had been top-killed by the application as long as four years before.  The explanation for the high percentage of mortality was the fuel provided by the dead material on the treated trees that increased the fire intensity.

The Mesquite Savanna Project at the Vernon Texas A&M station uses herbicides and prescribed burns to manage the mesquite growth form so that there is less foliage on the trees giving grass a better chance of growing beneath the trees.

You might also be interested in reading How to Beat Mesquite from Texas A&M Brush Busters.

Finally, I consulted the Wildflower Center's ecologist, Dr. Mark Simmons, and he said that he hadn't had any experience using propane torches on mesquite. He suspects, however, that there would be meristematic tissue safe below the surface that would allow resprouting. He uses a propane torch for weed control and many perennial herbaceous weeds (including grasses) can resprout after treatment. He thought it certainly would be worth trying but he isn't optimistic that is going to kill all your mesquite.

 

More Invasive Plants Questions

How to get rid of nut grass from San Antonio
March 22, 2011 - We just had a house built on a lot that was mostly rock. The small back yard has a berm on which they brought in soil then mulched it. Now we are getting all sorts of weeds through the mulch, what my...
view the full question and answer

Sheet mulching before planting Habiturf from Grand Prairie, TX
March 03, 2014 - Have you tried sheet mulching as a bed prep and to kill bermuda grass before planting habituff?
view the full question and answer

Science project on invasive plants in American Samoa
September 23, 2004 - What is an experiment I can do on invasive plant species for a science project? What are some main invasive plant species found in American Samoa? Where can I go to find more information on invasive ...
view the full question and answer

Skunk cabbage for Houston TX
September 19, 2009 - Can you find skunk cabbage in the Houston, Texas area?
view the full question and answer

Information about empress tree (Paulownia tomentosa)
March 07, 2008 - I have an Empress Tree, 3 yrs old, and the limbs grow straight out from the trunk about 2-3ft and then grow straight upward. When do they start to grow outward for a canopy??
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