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

Problems with Texas Ash in Cibolo TX
May 14, 2010 - I have a Texas Ash tree I planted two years ago. The tree was 10 feet high with thick foliage. This spring the leaves started falling off after I spread fertilizer on my yard. The end of the branches ...
view the full question and answer

Variegated leaves on Ungnadia speciosa (Mexican buckeye)
April 11, 2007 - I grew some mexican buckeyes from seed last year and one of them has variegated leaves. I haven't seen this before- have I just not looked at enough mexican buckeyes up close or is this an uncommon f...
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

Failure to bloom of Magnolia in Webster FL
May 24, 2009 - Do all Magnolias Bloom? I live in Central Florida - transplanted a Magnolia 7 1/2 years ago. It is a beautiful tree - very healthy - at least 10-12 ft. It has never had a bloom!! I have another li...
view the full question and answer

Is post oak resistant to oak wilt from Dallas TX
November 22, 2013 - I am confused. The NPIN website says that Post Oak IS susceptible to oak wilt, but all the other information I have been able to find says that it is resistant to oak wilt and rarely gets the diesase....
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