Black rot emerging

[saddlebronze]

I am seeing black rot on my marquettes. I missed a couple of sprays so it is my fault. It has not affected the other varieties. Should I remove the affected clusters or just keep spraying?

 

[grapeman]

If they are affected badly removing them helps prevent further infection in the future. If it is only a few grapes, just keep spraying and if they are bad when you pick, sor them out and destroy.