black rot in grapes

toppentech.comJune 3, 2013

has anyone ever tried to use coloidal silver on bvlack rot instead of things like captan??? i make my own and i intend on spraying leaves with silver and a surfactant probably once a week . has anyone ever tried this ??? thanks mike

Thank you for reporting this comment. Undo

Black Rot is a fungal infection. Silver has not been shown to be effective against fungi (or very many other things for that matter). I would worry about ingesting the silver (because it will get onto the tiny grapes) and whatever other compounds are associated with it.

Copper is the usual control for fungal diseases. It is about the only thing organic growers could use, but they may have other agents nowadays.

I cut down some of the grapes I had because they were so susceptible to BR fungus. I have since learned that sanitation of the grape area and choosing the right variety are the biggest weapons against BR. In other words, make sure all the mummy grapes and leaves are raked out and mowed over in the fall. The fungus overwinters on them.

Finally, if you have to use a massive assault to prevent your vines from defoliating or getting those ugly brown windows in them, look around for a list of grape varietals that will do better in your climate.

    Bookmark   June 8, 2013 at 9:49AM
Sign Up to comment
More Discussions
Gnarly old grape vine
A neglected grape vine/arbour with a lattice of thick...
Best evergreen (in zone 6b) vine to cover fence?
Hi, I'm new here. We bought a house late last summer,...
Vine recommendation
Can someone recommend a flowering vine which I can...
Umbrella trellis project, Mexican Flame vine
I have wanted to use an old patio umbrella frame as...
Vine for shaded area
Hello! I am looking for a fast growing vine for my...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™