En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Lesions on Agave Leaves in Spring Branch, Texas

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

Friday - January 14, 2011

From: Spring Branch, TX
Region: Southwest
Topic: Cacti and Succulents
Title: Lesions on Agave Leaves in Spring Branch, Texas
Answered by: Mike Tomme

QUESTION:

I have a giant Agave americana that was beautiful until recently. Several of the leaves have lesions, some of them quite drastic, on the last third of the leaf. What is causing this?

ANSWER:

Boy, am I glad you only asked what the problem is rather than what to do about it, because that would have been a really hard question.

Agave americana (American century plant) is normally resistant to most diseases, but this previous Mr. Smarty Plants answer gives some information on the anthracnose fungus which seems to be the most likely culprit in your situation. This fungus thrives in wet conditions which, I suspect, has been the situation where you live over the last year. Shade can also contribute to the problem.

Ok, what to do about it (hard questions don't scare Mr. Smarty Plants). Here is an article from the University of Arizona that (briefly) discusses the issue on page 7. This article, which was also cited in the previous Mr. Smarty Plants answer mentioned above, recommends removal of the affected foliage and also mentions a fungicide that can be used if that is your preference.

 

 

More Cacti and Succulents Questions

Damage to Yucca rostrata from Nottingham, England
February 26, 2014 - Hi, I have a yucca rostrata which has had its head snapped off in high winds (we live in Nottingham, England) we have left the trunk in the ground, will this re grow?? What is the best thing to do wit...
view the full question and answer

Growing Conditions for Yucca cernua
October 22, 2011 - Nodding Yucca or Yucca cernua: I bought many lovely plants at the Wildflower Center sale on Friday, among them, a Nodding Yucca or Yucca cernua. 24 of the 25 plants I bought are already in the grou...
view the full question and answer

How to prune Opuntia ellisiana in Decatur, GA.
August 20, 2009 - Hi Mr SP--How do I go about pruning an Opuntia ellisiana? I have saws, newspaper, heavy leather gloves, goggles, etc. But my question is more about what section of the plant to cut. The base has de...
view the full question and answer

Spineless prickly pear from Lago Vista TX
April 30, 2012 - We visited Lady Bird Johnson Center yesterday. I was impressed with the spine less prickly pear cactus. Is it a native or a hybrid?
view the full question and answer

Native plants for full sun in Austin
April 03, 2009 - I am looking for a tough, native TX plant to put in full sun location between the sidewalk and street. I would love for it to flower all summer. There is some irrigation but not much. I don't want ...
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