In the midst of what individuals are saying about the ability to grow vinifera in the East, don't lose sight of the weekly or bi weekly spray schedule from bud break to post harvest. The spray regimen is intense, complicated by the need to rotate sprays. Many of the effective sprays are quite...
I think you are asking an interesting question. I am seeing growers of vinifera in your part of the country struggling with vinifera. Temperature in winter or ripening period seems to not be a problem. The problems arise with the humidity and rain. It seems that even with intense spray regimens...
Thyme Guard is an insect repellent I plan on using just prior to harvest next year.https://www.arbico-organics.com/product/5838/Bean-Thrips-Caliothrips-fasciatus-Controls?gclid=EAIaIQobChMI3KOKhZrx5AIVg4bACh0HdA9AEAQYASABEgJWLPD_BwE
Here is the Bug-B-Gone product label. It isn't easy to find. https://www.ortho.com/sites/g/files/oydgjc116/files/asset_images/CFLs/ortho_bugbgon_concentrate.pdf The active ingredients are Bifenthrin, and Zeta-Cypermethrin. It says you can use it on raspberries, but doesn't say anything either...
I had the same problems with wasps and hornets. I learned this year that when they show up things are going to deteriorate quickly. I probably waited a week too long to pick.
I picked my Petite Pearl in N. Illinois yesterday. Mine got stuck at 19-20 brix, and the quality started going downhill. They don't hang well. With all the rain coming I thought it was best to pick. Ph 3.65. I got six gallons of must.
There are a number of yeasts that consume the malic acid. They really are quite remarkable at bringing down the acid levels. Maurivin B is one that I have used.
On Amazon you can buy inexpensive garden powder dusters. Also there you can buy a lb of Diatomaceous earth. It is a clay that is mined, composed of prehistoric diatom skeletons. The dust is microscopically razor sharp. Think of the little creatures crawling on broken glass after you apply it...
Dennis I couldn't find failed or successful experiments testing the diatomaceous earth, either at the homeowner level, or university type studies. Now I wish they would show up again...