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
1 rating

Saturday - August 17, 2013

From: Chappells, SC
Region: Southeast
Topic: Pests, Vines
Title: White sticky stuff on muscadine grape vines from Chappells SC
Answered by: Barbara Medford

QUESTION:

Muscadine vine has white sticky substance on leaves and vines, what is it?

ANSWER:

This sounds like aphids. Read this article from the University of California Integrated Pest Management Series on Aphids. Particularly note this paragraph:

"Low to moderate numbers of leaf-feeding aphids aren't usually damaging in gardens or on trees. However, large populations can turn leaves yellow and stunt shoots; aphids can also produce large quantities of a sticky exudate known as honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, which causes leaves to curl and further distorts growth. A few species cause gall formations."

Since Vitis rotundifolia (Muscadine) is largely a product of Southeast North America, please read this article from the University of Florida IFAS Extension Insect Pests on Grapes in Florida. Note this paragraph and look at the accompanying illustration:

"Grapevine Aphid, Aphis illinoisensis (Shimer)

Aphids feed on the foliage and vines of grape plants, but more serious injury results from the infestation of the developing fruit clusters. Dry weather contributes to the growth of aphid populations.

The grapevine aphid (Figure 6) is usually not important enough to necessitate specific treatments. Good production practices result in grapevines that are of sufficient vigor to tolerate some attack by aphids. Aphids are attacked by predators like ladybird beetle adults and larvae, and lacewing larvae that regulate their population."

 

From the Image Gallery


Muscadine
Vitis rotundifolia

More Vines Questions

Tip Dieback on Lonicera sempervirens
August 14, 2013 - I have a Lonicera sempervirens (coral honeysuckle) vine in Virginia which does well early in the season, but then around July, the very tips of its shoots (just the last 1-2 inches) wither, turn black...
view the full question and answer

A vine to atract hummingbirds in MO
March 08, 2011 - I am looking for a non invasive vine to plant on a trellis near buildings/brick patio to attract hummingbirds (and other birds and butterflies).
view the full question and answer

Native trailing plant for Nebraska
October 01, 2009 - I live in the tall grass prairie area of Eastern Nebraska and am working on some prairie restoration and native plantings. I have just put in a limestone retaining wall and would like to find a nativ...
view the full question and answer

What to do about mildew on Trumpet Vine?
November 25, 2009 - My Trumpet Vine tends to get mildew on its leaves. Any suggestions? Thanks so much.
view the full question and answer

Identity of vine with green flowers
November 03, 2012 - What is this trailing plant with half inch green flowers with gold metallic centers? Looks like a milkweed plant or gourd plant of some kind. I found it off Hamilton Pool road. West of Austin TX
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