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?

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

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
3 ratings

Friday - June 05, 2009

From: Cibolo, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Rust-colored spots on Lantana?
Answered by: Joe Marcus

QUESTION:

Mr. Smarty Plants, I live in Cibolo TX and my lantana plants are about 3 years old. They have done exceedingly well until this spring. The leaves have developed brown, rust colored spots and the leaves are dying--even on the new growth. I have trimmed it back twice, first thinking it was due to a freeze, but now I can't figure it out. Is it a mold; insects; fungus? And if so, what do I use to revive them?

ANSWER:

The short answer is, we don't know what is afflicting your lantanas.  There is a rust fungus that infects Lantana spp, but so far as we know it does not occur in Texas.  Other possiblities are lacebugs, spidermites, aphids.  Another possibility is herbicide damage.  Sometimes desirable plants get damaged when weeds are being attacked with herbicides.

We recommend you take a plant sample - take an entire limb - to your county's Agricultural Extension Service office for analysis.  You'll probably want to call first to make an appointment.  If your county agent cannot diagnose the problem, he or she may advise you to send it to a lab for further analysis.  Once they determine the cause of the problem, they can recommend an appropriate course of action.

 

More Diseases and Disorders Questions

Promoting bloom in Chocolate Summer Mimosa
January 11, 2008 - Please help! I purchased a Chocolate Summer Mimosa from one of our local nurseries. It was a brand new plant to them and they don't really know much about them. I planted it just 3 years ago as an...
view the full question and answer

Something killing evergreens on Long Island from Baldwin NY
June 06, 2011 - What seems to be killing so many of the evergreens on Long Island - see more and more dying each day - doesn't seem to be a rhyme or reason - can it be helped? Many thanks.
view the full question and answer

Fronds turning brown on yucca in Leander, TX
April 13, 2009 - Dear Mr. Smarty Plants, I live Northwest of Austin in Leander and have grown a spanish dagger yucca for several years. It is 8 feet tall and each spring it puts up a showy spike of blooms. The old fr...
view the full question and answer

Leaves browning on non-native willow from in Cumbla PA
July 10, 2011 - We recently planted a willow tree. A lot of the leaves turned yellow and some turned brown, but it is also getting some new buds. my question is, should I take the dead leaves off or leave them there...
view the full question and answer

Prickly pear doing poorly on Long Island NY
December 27, 2012 - First, thanks for your reply on 11-3-12, re.Can a prickly pear cutting from Harker Heights, TX find happiness in Long Island, NY. The plants were set before a southern window in the attic, temp. ra...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center