Never considered concord grapes or grapes in general as no spray fruit due to fungal disease like black rot but I’m in zone 8a maryland. Pierce’s disease can be an issue too. some cooler western MD areas can grow them no spray. its kind of a gamble here I think.
from what I have heard from others on the forum, they are not no-spray.
hazelnuts are not no spray. I’m taking a gamble on heartnuts being no spray.
I would add cornelian cherry and muscadines to the no spray list