Black spots on grape vines may also be a symptom of a fungal infection commonly referred to as black rot. Caused by the fungus Guignardia bidwellii, this disease results in brown irregularly-shaped spots with dark borders. As the disease progresses, small black dots will appear within these spots.Click to see full answer. In respect to this, how do you get rid of black spots on grapes?Cut off the obviously affected parts of the grape vine with a sterile knife. Remove all spotted leaves and the black, mummified grapes. Be extremely thorough and make sure you remove all parts of the plant that are affected by the black rot. Place fans in the growing area to keep the plants dry. can I eat grapes with brown spots? Waiting too long to eat grapes after they’ve been harvested will obviously lead to a brown discoloration of the fruit, but having grapes turn brown and rot while on the vine hardly seems fair. But as far as diseases and insects are concerned, all is fair when it comes to survival. Also know, is it safe to eat grapes with black spots? Dark spots on fruits and vegetables can make them look unappetizingn and spoiled, but they’re actually just as edible as the spot-free ones. Here’s why. That said, the rest of the fruit or vegetable will taste fine, so you can cut around them and easily salvage the rest.Is it safe to eat grapes with mold?Here’s what to do: Don’t buy any produce that has mold on it. Discard small fruits, such as grapes or berries, if moldy. If a few berries at the top of a box are moldy, it’s okay to eat the rest, but look them over carefully.