Rent Shop Volunteer Join

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
1 rating

Thursday - August 21, 2008

From: Sturgeon Bay, WI
Region: Midwest
Topic: Trees
Title: Wilting of Mountain Ash in Wisconsin
Answered by: Barbara Medford

QUESTION:

What type of disease would cause a Mountain Ash to entirely wilt? The bark on bottom of tree is opening up and is spongy feeling. No sign of any disease until last month and it quickly wilted with brown leaves. The tree is in a natural area with no soil contamination or compaction. It received plenty of water.

ANSWER:

We are going to assume that your tree is the Sorbus americana (American mountain ash), native to Wisconsin and a member of the Rosaceae family, and not Fraxinus americana (white ash), also native to Wisconsin and a member of the Oleaceae family. There are a number of diseases said to affect the Mountain Ash, and we are going to find websites that describe them and perhaps give you some information on control. Here is a Wisconsin Botanical Information System website on Sorbus americana.

University of California Integrated Pest Management Fire Blight

Nevada Plant Pathology Canker diseases on ornamental woody plants

Pictures of Bark  Canker

University of Maine Pest Management Lab Crown gall-often a problem on members of the Rosaceae family

Diagnosing and recommending treatment of a plant at a distance is nearly impossible. We suggest that you contact a trained arborist or your University of Wisconsin Extension Door County office.

 

More Trees Questions

Changing color of crape myrtle blooms
July 08, 2008 - I have 5 well established crape myrtle trees whose blooms are a very light lavender/pink color. I would like to know if there is any way to deepen or change the color of the blooms. I would prefer a m...
view the full question and answer

Looking for yellow bottlebrush (Callistemon sp.) and native substitutes
February 14, 2008 - I have been looking for years for a yellow bottle bush. It is identical to the red but is yellow. there are several varieties, but the one i want is just like the red one in appearance. I live in Flor...
view the full question and answer

Chinkapin Oak Planted Too Deep
July 15, 2014 - I planted a 15 gallon chinkapin oak last year and it's doing very well. As I didn't know that much about tree planting at that time, I planted it too deep by probably 3 inches. Is this a very seriou...
view the full question and answer

January good time to plant live oak in January from Manor TX
January 19, 2014 - I want to plant a Live Oak in January. Is this a good time to plant it?
view the full question and answer

Tulip trees losing bark in OH
July 11, 2011 - We have two tulip trees in our yard that are losing their bark at the base of the trunk. I am careful with the mower keeping away from the tree when I mow. What could the problem be and what can I d...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.