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.
From:Chappells, SC Region: Southeast Topic: Pests, Vines Title: White sticky stuff on muscadine grape vines from Chappells SC Answered by: Barbara Medford
Muscadine vine has white sticky substance on leaves and vines, what is it?
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."
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."
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