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
Not Yet Rated

Monday - July 21, 2008

From: Evansville, IN
Region: Midwest
Topic: Trees
Title: Large ash tree with round white spot on bark
Answered by: Nan Hampton

QUESTION:

I have a large ash tree that seems to be fairly healthy. However, it has a large round white spot (about 18" diameter) on the bark, about 3' up from the base. Within the solid white circle the bark is very shallow in depth, as though the bark is magically getting thinner and thinner in this area. There are no signs of holes and no visible fungus growing. Three different tree trimming companies have looked at it and all say they've never seen this before and the tree looks healthy otherwise.

ANSWER:

I'm not sure which ash tree you have, probably Fraxinus americana (white ash), but Fraxinus nigra (black ash), Fraxinus pennsylvanica (green ash), Fraxinus profunda (pumpkin ash), and Fraxinus quadrangulata (blue ash) also occur in Indiana. Then, there is also Sorbus decora (northern mountain ash). Here are some links to information about Fraxinus spp. and Sorbus spp. disease and pest problems:

"What's Ailing Your Ash Trees?" by Jill D. Pokomy

"Ash Tree Problems" by Sandra Mason

"Ash Yellows and Decline" from Missouri Botanical Garden

Fraxinus Insect Problems from Michigan State University Extension

Sorbus Disease Problems and Sorbus Insect Problems from Michigan State University Extension

I am sorry but I haven't found anything that sounds like your tree's problem. I suggest that you contact the Indiana Department of Natural Resources Forest Service to see if they have encountered this type of problem on ash or any other trees.

 

More Trees Questions

Magnolia Not Doing Well in Round Rock, Texas
June 25, 2011 - I have a Magnolia grandiflora in my back yard, planted on May 20th of this year. Located on a western exposure with no shade and about 18' tall x 10' wide. I've been watering it every 3-4 days or ...
view the full question and answer

Privacy screen for Sedona AZ
August 02, 2013 - I live In Sedona Az. A builder just built a house next to my house and the new house is ugly to look at. What plant or tree would grow fast and reach 18 foot in height fast. It can be about 5 to 6 foo...
view the full question and answer

Ostrya virginiana Compatible with Juglone
May 17, 2015 - Is Ostrya virginiana sensitive to juglone?
view the full question and answer

Native evergreen tree for horse pasture in New Jersey
April 05, 2009 - I just pulled out a laurel that was hiding a stand pipe in our horse paddock. We had trouble this winter with the horses eating it when there was little grass to graze on. Can you suggest an evergre...
view the full question and answer

I need a tall tree with kind roots for a narrow space
March 11, 2009 - We have a space in the yard where a building is within 3 to 6 feet of where we would like a tall tree. What tree could achieve two stories in height, while not messing with the foundation of the bu...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center