Explore Plants

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
    
 

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
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

Non-blooming Tecoma stans in Fredericksburg, TX
June 30, 2008 - We have an esperanza plant purchased last year from Walmart and planted outside before winter. It flowered excellently last year. Just before winter we cut it back to about a foot. So far this summer ...
view the full question and answer

Keeping dogs and cats out of flower gardens
March 02, 2009 - Do you have any suggestions to keep the cats and dogs out of my flower garden? They either just walk through it, and trample everything, or sleep on the soft blooms and squish everything. I am despe...
view the full question and answer

Problems with Eastern hemlock in Greenville SC
July 02, 2009 - Dear Mr. Smarty Plants, I have a beautiful, young, 5 and a half foot tall Eastern Hemlock. I purchased and planted it two years ago in the fall. It has been doing very well all this spring. And ne...
view the full question and answer

Red and black bugs on hibiscus
June 19, 2009 - I can't get your Keyword search to work.. I have tiny red and black bugs on my hibiscus. I have tried 2 different garden sprays and neither seems to kill the tiny bugs. They barely move on the pla...
view the full question and answer

Pest on leaves of native Texas persimmon in Laredo, TX
February 20, 2009 - I have a transplanted a Texas persimmon tree from the wild. It has some globes in the leaves. It seems like some pest injected something from underside of leaves. Any suggestion? What is happening t...
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.