My grapes now have a mold like substance on them. what is it and what can I do about it.
You throw em out
ummmm throw the away
If your grapes have a mold like substance on them, that might be powdery mildew, which shows up as a white coating. You can talk to a specialist for more advice on that. Read more at http://www.ehow.com/powdery-mildew-on-plants/.