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Sep 22, 2016 11:15 AM CST
|what is the black dust on my vines. spreading fast|
Sep 22, 2016 11:22 AM CST
|Hi Alan and welcome to NGA!
Sounds like you have Sooty Mold, Fumago vagens. It's a fungus that grows on the droppings of insects like aphids that sucks the sap from plants. The fix is get rid of the bugs then apply a fungicide to kill the mold. If there aren't too many leaves then you can wipe it off with a damp paper towel but you'll still need to get rid of the bugs.
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