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

Tuesday - December 08, 2009

From: Austin, TX
Region: Southwest
Topic: Trees
Title: Live oak trees dropping leaves in clumps
Answered by: Jackie OKeefe and Nan Hampton

QUESTION:

We have several large mature Live Oak trees in our Austin TX neighborhood. Now that the rains have come back and the acorns are falling, two of our four trees are also dropping large amounts of leaves in clumps connected to small twigs. I do not see this happening in our neighbors yards. At first I attributed it to stress, but now I'm a bit worried. Both are near the house built 30 years ago. The oak trees are clear of the house.

ANSWER:

The good news is that what you describe doesn't sound like oak wilt, a serious problem with live oak trees in the Austin area.  You can read about the characteristics of oak wilt from the Texas Oak Wilt Information Partnership. We assume that you've ruled out squirrels.  Squirrels do sometimes knock off clumps of leaves in their enthusiasm for collecting acorns. Your trees may be showing the stress from the recent drought and sudden weather change or it is possible that they are being attacked by Oncideres cingulata (twig girdler). Here is an image of the insect. In actuality, we can't really diagnose your problem sight unseen.  If your trees are still losing large numbers of leafy clumps, you may want to ask an arborist to take a look at your trees. Here are several links to sites that can help find a qualified arborist in the Austin area:

Evaluating and Choosing an Arborist  

Web Search Tool to find an Arborist 

Site to Learn About and Find a Consulting Arborist

 

More Trees Questions

Care of lemon cypress (Cupressus macrocarpa)
May 17, 2008 - How do I grow the lemon cypress in zone 7? I bought one today at Home Depot in Granbury,TX. It had no information. Should I put it in the shade or sun?
view the full question and answer

Wound in Monterey Oak from Austin
June 20, 2012 - I have a 10 year old Monterey Oak that has developed a wound that is secreting a white bubbly substance that has attracted all the bugs, like butterfly's , pill bugs, ants, and several others I don'...
view the full question and answer

Young pecan trees with leaf and branch problems from Gatesville TX
November 18, 2013 - I have a young pecan tree that had very rapidly browning Leaves. They became brittle and so did the branches with affected leaves. The branches soon fell off. We treated with fungicide during that pro...
view the full question and answer

Need help with a misshapen Monterey Oak in Austin, TX
March 11, 2010 - In the Fall of 2008, I purchased a very tall Monterey Oak from TreeFolks at the Burger Center Sale. Since the wind was so high, all the tall trees were on the ground, and I guess that is why I did no...
view the full question and answer

Obtaining bark of Larix laricina from Hyderabad India
January 26, 2012 - I am in need of Larix laricina (Bark) for my research work. Please let me know how to procure it.
view the full question and answer

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