what is wrong with my grapes?
 

hallo,
some of the grapes on my bunches are discoloured a sort of pink - they are supposed to ripen in october to a pink colour but i dont think this is a ripening-type of pink. is it some soprt of disease? i've been cutting out affected grapes. the leaves have gone brown and are falling off but i thibk thats because earlier on i sprayed them with a stronger solution than i should have done.

can anyone throw light on the situation?

thanks, karaman