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

Wednesday - May 11, 2011

From: Gilbert, AZ
Region: Southwest
Topic: Diseases and Disorders
Title: Something eating Arizona ash in Gilbert AZ
Answered by: Barbara Medford

QUESTION:

Something is eating my Arizona ash tree. what should I spray on it?

ANSWER:

The first thing we do when we are trying to diagnose a problem with a plant is to find out if it is native to the area where it is growing. A plant growing where it is not native may be having trouble with soil that has the wrong pH, or less rainfall that the plant is accustomed to, extreme heat, extreme cold, etc. However, the Fraxinus velutina (Arizona ash) does, indeed, grow natively in Maricopa Co., Arizona.

The main pest we found mentioned in connection with the genus Fraxinus is the borer, and the worst of the borers is the Emerald Ash Borer, from an Invasive.org article on the problem. These are introduced beetles from Asia that came into the United States in about 2002 on wood used in cargo bays of ships. The early mentions of this bug are all centered in the Northeast and Midwest, but we understand it is spreading fast.

Since we are not entomologists, we suggest you contact the University of Arizona Cooperative Extension Office for Maricopa Co.  They are closer to the problem and can probably tell you very quickly what is making holes in your tree and what you can do about it.

 

More Diseases and Disorders Questions

Treatment of mealy bugs on house plants
April 19, 2005 - I have some house plants that have a "fungi" that has appeared and spread from one to the others. I believe it is killing the plants. It is a white fuzz the is sticky to the touch. when i whip it...
view the full question and answer

Insects attacking Gregg's Blue Mistflower from Comfort TX
June 20, 2013 - I have a beautiful stand of Gregg's Blue Mist flower that have been attacked by an unknown insect. The new growth is curled and stunted and it is not flowering. I'm not alone..I've seen the Gregg'...
view the full question and answer

Tree Lost Leaves
September 05, 2013 - Are leaf cutter ants found in Michigan too? My leaves are being completely stripped off the tree. It went from growing very well when we planted it, to having completely no leaves at all. I know the l...
view the full question and answer

Live oak with brown balls and brown spots in Round Rock PA
August 01, 2010 - Is my live oak sick? Brown spots are on the leaves and round brown balls are growing on the stems. Please help.
view the full question and answer

Berry-looking parasites on live oak leaves
September 20, 2013 - Dripping Springs TX Live oaks. What are these berry looking parasites on my tree's leaves. As many as 4 1/4 in berries per leaf. I have 3 acres with dozens of liveoaks all having them on the leav...
view the full question and answer

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