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

Saturday - June 09, 2012

From: Nevada, TX
Region: Southwest
Topic: Pests, Trees
Title: White ash trees with bunched up leaves from Nevada TX
Answered by: Barbara Medford

QUESTION:

I have very young white ash trees (3' tall planted this winter) The leaves are crippled not opening up bunched up together and have a white powder. Is this aphids mites or what. Only on one tree. The rest have skeleton type leaves. What is the problem and how do I control it. I can send a picture if needed

ANSWER:

Apparently, this is a problem that is going around with ash trees. Here is a previous Mr. Smarty Plants answer on the same subject. According to this USDA Plant Profile map, White Ash is native to the area of Collin County, in north Central Texas, so that should not be a problem. If you follow the plant link, Fraxinus americana (White ash), to our webpage on this tree you will find this statement:

"Susceptible, like many ashes, to a wide variety of disease and insect pests; these usually are not a problem to vigorously growing trees. Seedlings will tolerate quite a bit of shade, but if a full crown is desired, a generous amount of sun will be necessary as the tree matures. Prune in fall."

From this USDA Forest Service website, here is an article on White Ash. Scroll down to the Use and Management section, where you will get a fairly long list of things that can happen to the members of the Fraxinus (ash) genus. The most comprehensive study of pests on ash trees is this one from wiki.bugwood.org.

Sadly, everyone seems to want ash trees, because they are fast-growing and make good shade trees, but they are short-lived.

 

From the Image Gallery


White ash
Fraxinus americana

White ash
Fraxinus americana

White ash
Fraxinus americana

More Trees Questions

Seeds or seedlings of Texas madrone (Arbutus xalapensis)
January 03, 2009 - Where can I obtain seeds or seedlings of the "Texas Madrone" tree? Thank You.
view the full question and answer

Trimming oaks and elms from New Braunfels TX
June 20, 2012 - I would like to trim my live oaks and elm trees at the same time, if possible. I think they are American Elms. When is the best time to do this and avoid oak wilt and Dutch elm disease? Should all c...
view the full question and answer

Texas Ash secreting sap in Lockhart, TX
July 05, 2012 - I have what I believe is a Texas Ash in my front yard that is secreting a sap with what looks like some wounds on it with some white stuff and with black and red looking ants as well as it has a lot o...
view the full question and answer

Are palm tree seeds toxic?
July 08, 2011 - Are palm tree seeds toxic to other plants? I have palm trees around my pool and it seems that nothing will grow very good where the old seeds are in the ground.
view the full question and answer

City tree ordinance information
January 10, 2010 - Dear Mr. Smarty Plants, I am writing to you in regards to city tree ordinances. I am a citizen of Grand Prairie, TX. and although the city is a Tree City, the city does not have a tree ordinance. T...
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