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
Not Yet Rated

Thursday - June 17, 2010

From: Morrow, OH
Region: Mid-Atlantic
Topic: Non-Natives, Diseases and Disorders
Title: Insects on hybrid 'Ann' magnolia in Morrow OH
Answered by: Barbara Medford

QUESTION:

I have an Ann Magnolia. It is covered in all kinds of stinging insects and flies. This has never happened before. Is this a common problem for the tree? What should I do?

ANSWER:

According the U. S. National Arboretum, Magnolia 'Ann' is a hybrid of Magnolia liliflora 'Nigra' x Magnolia stellata 'Rosea'.  M. liliflora is a native of China and M. stellata is a native of Japan, putting it out of our range of expertise, which is plants native not only to North America but to the area in which it is being grown.

In this article from the Ohio State University Extension Magnolia Pest Leads to Sticky Situation  we learned about Magnolia Scale. We have extracted a couple of paragraphs for clarity, but you should read the whole article, which gives suggestions for treatment of the scale, to take care of the flying insects problem. 

"Another indication of magnolia scale results from the large quantities of sap sucked from the plant as scales feed. The sap provides a low-protein, high-sugar diet, and in order for the scale to obtain adequate amounts of protein, the insect must ingest excessive amounts of sap. Much of this sap is excreted by the scales, which produces a clear, sticky, sugary substance known as honeydew.

This honeydew coats twigs, leaves and anything under infested branches, including cars and patio furniture. If the honeydew is not removed, a more obvious, unattractive black fungus known as sooty mold begins to grow. This is often the first symptom of infestation that people notice. Yellow jackets, wasps and ants also are good indicators of infestations as they are often attracted to the sweet honeydew on which they feed."

In addition, here is an article from the Penn State Cooperative Extension Woody Ornamentals IPM, with more information on controlling the scale, which causes the sap exudation, which attracts the flying insects you are seeing.  You might also contact the Ohio State University Extension Office for Warren County

 

More Diseases and Disorders Questions

Growing Loblolly Pines Outside Native Range
April 03, 2014 - I would like a stand of pines on my property but do not know if they will grow in my area. Do you know if the soil in Waelder, Texas will support pines?
view the full question and answer

Loss of bloom on Fremontodendron californicum in California
June 11, 2009 - The flowers on my Flannel Bush all died at once I have noticed a sappy substance at the base of the trunk. There are still some flowers on bush but most are dead. It has been blooming since Feb. Is ...
view the full question and answer

Leaves wrinkling on Tecoma stans from San Antonio TX
August 16, 2013 - My two year old esperanza (planted in the ground) froze back last winter, came back from the roots & has been doing well all summer. Recently one branch has leaves that are nice & green but very wrin...
view the full question and answer

Habiturf installation after Take-All fungus
January 24, 2012 - Are other soil remedies needed (besides those listed in your Habiturf brochure) to install Habiturf on land which had a St. Augustine lawn which was decimated by take all patch.
view the full question and answer

Non-native sedum 'Burrito' sunburned in Providence RI?
June 28, 2010 - I have a sedum burrito that I keep outside and receives bright sun for around 6 hours a day. it looks like it's getting sunburned, the leaves are getting shriveled and browning on the tips. I've bro...
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.