What Causes Brown Spots on Grapes

The fungus Elsinoe ampelina is a common attacker of the home-grown grapes. … It causes Anthracnose of grapes, which is the formation of brown or black spots on the fruit. The distinctive spots resemble a bird’s eye, hence the alternate name ‘bird’s eye rot. ‘ The disease mostly occurs in the warm, wet seasons.

How do you treat brown spots on grapes?

Prune out diseased canes and fruit mummies. Remove infected plant material from the vineyard and destroy it. Dormant applications of lime sulfur or Bordeaux mixture are effective against the fungus, as are foliar applications of registered fungicides on two-week intervals during the growing season.

Is it OK for grapes to have brown spots?

In most cases, surprisingly, the grapes with brown spots are just as edible as regular normal grapes. However, if they have a severe infection, it is better to discard them.