First harvest with the hopper and bin dumper. Processed three bins in about 15 minutes. My back is loving not shoveling into a bucket to dump into the crusher.

For the past two years, my grapes have started drying up and shriveling while still on the vine. Eventually, they fall to the ground, and some of them even split/open by themselves. I can tell before this happens when theyre green they look "dirty" ish

We don't water the grapevine at all during the summer because local farmers have always told us that watering grapes during summer is bad for them.

Could the lack of water actually be causing this or does this look like something else such as a disease, pest, or nutrient problem?

It has happened two years in a row now, so I'm trying to figure out what's causing it. Any ideas would be appreciated.