I’m closely following your thread. Please post any further developments - I’m curious if your pears are going to hold and survive.
I experienced a very similar issue with my pears - the Surround application didn’t help at all, you can see it Losing it to plum curculio - Ambrosia Pear
This year I’m going to try PyGanic Gardening Pyrethrin Insecticide. Let’s hope for the best.