It will be a while before we can sort things out, but here's what I'm thinking. I'll fill in on a few details below. Black vine weevil adults can survive our winters if they are mild, and there is a bit of protection. Normally the adults appear in July and start laying eggs in late July or August. Egg laying continues, following temperature patterns.
Warmer temperatures mean faster development and more eggs laid.
Two years ago conventional growers lost the registration of Furadan, but had another insecticide registered. The new material was Brigade, a pyrethroid. The new material was recommended to be used a bit earlier in the season, compared to Furadan. It also had the advantage that the pre-harvest interval was zero days. After talking with Dr. Rich Coles at the Connecticut Agr.