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."
Pest on leaves of native Texas persimmon in Laredo, TX February 20, 2009 - I have a transplanted a Texas persimmon tree from the wild.
It has some globes in the leaves. It seems like some pest injected something from underside of leaves. Any suggestion? What is happening t... view the full question and answer
How are NPIN Deer Resistance Ratings Determined? May 06, 2014 - If your plant data-base (which is the best thing since sliced bread!) is silent on the degree to which a plant is deer-resistant, does this mean you just don't have enough information to make the cal... view the full question and answer
Protection of Mountain Laurel from Pyralid or Genista moth caterpillars May 28, 2006 - I have a Texas Mountain Laurel. Every year it is attacked by caterpillars. They form a bag for lack of a better word on the ends of the branches destroying the blooms for the following year. PLEASE... view the full question and answer
Pruning live oak in Austin April 28, 2012 - Hi, We recently purchased a house in South Austin and there is a huge Live Oak Tree about 6 feet from the back door (so so so love it!) The only real issues I have so far are:
1. Needing to trim a ... view the full question and answer
Striped caterpillars on Cornus sericea (redtwig dogwood) September 07, 2011 - My red-twig dogwood has white/black striped caterpillars that congregate on the underside of the leaves and they are stripping the leaves. What can I do? They almost look like Monarch butterfly larvae... view the full question and answer