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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. That said, the rest of the fruit or vegetable will taste fine, so you can cut around them and easily salvage the rest.
Hereof, are brown spots on grapes OK?
Grapes are quite sensitive to herbicides, so don't use them anywhere near your vines. Black rot is a fungal disease which covers the leaves with brown spots and black pimples, and turns the fruit black, rotten, and shriveled. It can occur any time during the season during warm and wet conditions.
Besides, why do grapes have brown spots?
What causes the grapes on my vine to turn dark and shrivel up like raisins? Black rot, caused by the fungus Guignardia bidwellii, consistently destroys grapes in the Midwest and Eastern USA, especially during wet seasons. Black rot disease is also observed on grape leaves as circular, tan spots with dark margins.
It can infect ripe strawberries. Brown spots on strawberries are most easily seen on immature fruit. If the fruit is still green or white, the spots will be most visible. Ripe fruit can get leather rot also.