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
1 rating

Thursday - April 17, 2008

From: St Augustine, FL
Region: Southeast
Topic: Trees
Title: Treatment of black mildew on magnolia
Answered by: Barbara Medford

QUESTION:

I think my magnolia has black mildew. How do I treat it?

ANSWER:

We are assuming that your tree is the Magnolia grandiflora (southern magnolia), which is native to Florida. We found an excellent website on this plant from the University of Florida Extension Service. Near the end of the article is a section on Diseases, where we found this information: "Magnolias may be subject to leaf spots, blights, scabs and black mildew caused by a large number of fungi or a bacterium, but they rarely require chemical controls. Raking up and disposing infected leaves may reduce leaf spots next year."

For better on-the-spot information and suggestions on control (or the lack of need for it), go to this website from the St. John's County Extension Office. It has phone numbers and e-mail address for you to contact them. If the problem you are having is widespread, they will be aware of it and can offer you publications and advice in your environment.


Magnolia grandiflora

Magnolia grandiflora
 

More Trees Questions

Root suckers growing from base of oak in California
November 24, 2008 - I planted four trees labeled by the nursery when purchased as "Louisiana Oaks" approximately 20 yrs ago in my front yard. All trees are growing well but one of the four has a progressing mass of ro...
view the full question and answer

Color year round, welcome to Austin Texas.
December 04, 2011 - I am new to Austin and want to plant colorful flowers for fall and winter that get a "wow" reaction. I have not seen much at the local nurseries. Any and all suggestions are greatly appreciated!
view the full question and answer

Sappy dew killing plants under oaks in Missouri
September 19, 2008 - There is a sappy dew killing my perennials.I have several large oaks in my yard. I had different kinds of shade perennials around each base of the trees. But as years have gone by, the different varie...
view the full question and answer

Anacacho orchid tree (Bauhinia lunarioides) and the freeze in Austin
February 03, 2010 - I just wanted to say that your answer in today's Austin American-Statesman about recent freeze damage to Anacacho orchid trees was right on for ours as well. We're in north central Austin and all t...
view the full question and answer

Non-native, and/or invasive bermudagrass, St. Augustine and Pistache from Houston
September 24, 2012 - Our St. Augustine lawn died suddenly this summer from either chinch bugs or grub worms (or both?), and a multitude of weeds and native Bermuda have taken over the area. Now that the weather has cooled...
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