En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Sticky white substance from Arizona Ash tree in Arlington TX

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 - June 11, 2009

From: Arlington, TX
Region: Southwest
Topic: Trees
Title: Sticky white substance from Arizona Ash tree in Arlington TX
Answered by: Barbara Medford

QUESTION:

Our Arizona Ash Tree is producing a white substance that floats down from the tree almost like a snowflake the size of a bb. You cannot see it on the tree/leaves. When it lands on the car, it takes the shape of a tiny pyramid and when you wipe it off, it leaves a greasy residue. What is this and how do we get rid of it? We've had these trees for many years and have never seen this before. Thank you.

ANSWER:

Fraxinus velutina (velvet ash), also called Arizona Ash, is discussed in this USDA Forest Service website Velvet Ash. Among the pests that are mentioned in that article are ash borers and verticillium wilt. Neither of these present the symptoms you are describing. Another possibility is found in this forestpests.org site Woolly Ash Aphid. One more suspect is found in this University of Florida Institute of Food and Agricultural Sciences website Ash Whitefly.

Since we are gardeners and neither plant pathologists nor entomologists, about the best we can do is suggest you look at these websites we have mentioned and see if you recognize any of the symptoms. Then, consider contacting the Texas A&M AgriLIFE Extension Office for Tarrant County. Perhaps there are others in your area experiencing these problems, and they can help you with a diagnosis and, hopefully, a solution. 

 

More Trees Questions

Do Deer Eat Orchid Trees?
March 08, 2013 - I have planted three anacacho orchid trees, however we have a lot of deer around us. Is this a tree they will want to eat? Do you have any ideas to keep deer away?
view the full question and answer

How Do Persimmons Breed - Starkville, MS
August 14, 2012 - Thank you for your earlier response about the genders of native persimmon trees. We have two, a much larger one that has borne fruit for years and years and a smaller one that I'd just assumed was m...
view the full question and answer

Best dogwood to plant in Dallas GA
June 13, 2010 - I am interested in how to select the best dogwood (Flowering) tree to plant in Dallas, GA 30157. The location receives full sun, the soil is typical GA clay/?. I found a list of 20+ Dogwood trees on...
view the full question and answer

Failure to bud out of nuttall oak in Albany GA
April 26, 2010 - We planted a nutall oak in the fall of 09. It seemed to fare well during the winter. It is now spring and all of our other trees are budding out. The limbs are flexible. Not breaking off easily like t...
view the full question and answer

Plant spacing of Cenizo in Bulverde TX
November 14, 2009 - How far apart should Texas sage be planted?
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