En Español

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
Not Yet Rated

Thursday - April 17, 2008

From: Round Rock, TX
Region: Southwest
Topic: Vines
Title: Red blister-like bumps on grapevine
Answered by: Barbara Medford and Joe Marcus

QUESTION:

I have just discovered red blister like bumps on a grapevine. It is on the leaves as well as the stems. What could this be? Will it harm only the grapevine or other plants as well? Thank you.

ANSWER:

We went to our Native Plant Database and found three vines that are native to Texas, and assume that you are growing one of these: Vitis mustangensis (mustang grape), Vitis monticola (sweet mountain grape), and Vitis rotundifolia (muscadine). Those red blisters are leaf galls. Common ones are called grape tomato gall, grape tumid gall, or grape tube gall. All of these are caused by midges (tiny flies). Minute wasps can also cause leaf galls on some plant species. This website from the Cornell University Integrated Pest Management Program on Grape Tumid Gallmaker has a great deal of information on the problem and solutions. If, as you read this article, it appears to you the dates of appearance of the galls are a little out of whack with your observations, remember that Cornell University is in New York - their Spring comes later and Fall comes earlier.

Although these galls are unsightly, they do not interfere with grape production unless they are numerous. We could find no indication that the infestation might spread to other types of plants. If you feel you might need some sort of advice on controls, go to this Texas Cooperative Extension website for Williamson County Home Horticulture. At the bottom of the webpage, you will find phone, fax and e-mail information for reaching their office. If the problem you are having is showing up in other gardens in your area, the Extension Office may have some literature or advice on how to handle it.

 


Vitis mustangensis

Vitis monticola

Vitis rotundifolia

 

 

More Vines Questions

Problems with morning glory in Tennessee.
June 09, 2009 - I recently moved to Tennessee from Michigan. On my property I have a perennial morning glory. This year the leaves are all bubbly, the stems have white hard stuff on them and there is a brown hard t...
view the full question and answer

Evergreen vine for wall and long-blooming shrubs in San Antonio TX
May 04, 2014 - What is a good native vine that stays green all year to plant along a rock courtyard wall? Also what are native bushes that flower for the longest period of time? Thanks.
view the full question and answer

Eliminating kudzu from Richmond KY
March 26, 2014 - I live in Richmond KY, Kirksville area. I have noticed that Kudzu has started to grow in my patch of land next to the creek. How can I get rid of this before it becomes a big problem?
view the full question and answer

Identify red-flowering vine in E. Texas
April 03, 2009 - Beside a well on an old homestead in Deep East Texas, there is a delicate vine. The leaves are heart shaped with points all the way around. The flower is a bright red trumpet shaped. I saw an angel ...
view the full question and answer

10 year old Wisteria fails to bloom in Rockwall, TX.
May 15, 2013 - I love wisteria. I had four (4) wisteria plants professionally planted at least ten (10) years ago. These wisteria plants have NEVER bloomed. Why not?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center