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

Carolina Jasmine failing to turn green in Pleasant Garden NC
April 26, 2011 - We planted Carolina Jasmine last year and it did great. This Spring we only have about 2-3 small green leaves beginning on the vines. We did not cut them back in the Fall. Is it time for them to be tu...
view the full question and answer

Trellis plant for Southern California
October 29, 2009 - What is the best selection for a trellis plant? I live in Southern CA (zip 91701), and the area is on the southern part of our home with little or no shade. Thanks!
view the full question and answer

Ivy a suitable ground cover in Live Oaks from Gulfport MS
April 17, 2014 - Will Ivy be a safe and suitable ground cover for old growth Live Oak trees in coastal Mississippi?
view the full question and answer

Virginia creeper in trees
April 26, 2008 - Can Virginia creeper be allowed to climb on trees--specifically Texas ash and live oak--or will it damage them if allowed to attach itself? We are thinking of using it as erosion control in a greenbe...
view the full question and answer

Eliminating unwanted vine on arbor in San Francisco
November 20, 2012 - There is a vine growing on our arbor, it has sickle-shaped pods and is crushing the arbor, how do we get rid of it?
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