Grapes have been progressing much quicker than I anticipated this year. Our vineyard is in Bumpass, VA .. Chambourcin brix is measuring at 21.4 .. temps are getting real cool at night .. Racoons have got about 30% of my harvest. Was planning to let hang as long as I can this year but that might result in 100% loss to the racoons (we have set traps, etc.).
Thoughts on harvesting these in a few days at say 22 brix?
You do what you got to do. A friend of mine made a pretty darn good Chambourcin Rose last year and this year he is thinking of making all of his Chambourcin this way. Are they netted? You may have raccoon and bird predation. Are they high wire trellised? It probably matters not if it is from raccoons because they will climb the vine.
I have read that rags soaked in amonia might help deter raccoons. Perhaps you could put some out along the perimeter of your row.
Where is most of the predation taking place - at the end of the row or more in the middle? My experience is that birds will hit the ends of the row first. Raccoons, on the other hand start in the middle - at least that has been my experience.