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

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

Identifying vine in Alabama
June 16, 2008 - I have a vine growing on my fence and I need help identifying it. The leaves are a large and medium green oval shaped and along the vine there are clusters of tiny(really tiny) flowers.They are a pale...
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

Vines for fence in Bentonville, Arkansas
June 12, 2013 - I have about 600 LF of 8ft high chain link fence I would like to grow vines on in Northwest Arkansas for screening. I would like some to cover quickly but be maintenance friendly. I heard alternating ...
view the full question and answer

Vine for lanai in St. Augustine FL
August 16, 2009 - What vine can I grow to attach to a screened in lanai around my pool? Will it damage my screen?
view the full question and answer

Foundation plants unlikely to provide good shade for rattlesnakes in TX
August 28, 2011 - I would like to plant native grass around my new home in the country near Mason, TX. My concerns are the rattlesnakes that are common here, and if they could "hide" in the native grasses since they ...
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