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

Viability of Texas madrone tree in Weatherford, TX
September 27, 2005 - I live in Weatherford, Texas (Parker County). Will a Madrone tree make it ok here and who sells them?
view the full question and answer

Will deer eat lemon cypress trees from Hayden ID
June 02, 2012 - Do deer eat lemon cypress trees? We do not think so since they are so spiny, but wanted a clarification.
view the full question and answer

Leaves on maple turning red in June in Pittsburgh PA
August 01, 2010 - We live in PA and have a medium sized maple tree in our back yard. It is not a red maple. This year, in June, the very top of the tree's foliage turned bright red. This bright red started at the t...
view the full question and answer

Native landscaping plants for Sherman, Texas
December 19, 2007 - We are starting from scratch on landscaping our new yard. We live in Sherman, TX and I would like to use plants and flowers that are native to Texas and have a good chance of surviving. What are you...
view the full question and answer

Premature leaf drop on Red Maple in Kentucky
June 25, 2008 - I have a ten foot Red Maple tree that has been set out for 4 years. Its leaves have slowly turned colors until it currently looks like fall. The leaves are not falling off nor is there yet any s...
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