Posted: 26/02/2017 at 17:05
Sounds like cutworms rather than Vine weevils. Cannot say that I have ever found V.w. on any of the Onion family and I grow a few of them. However I have seen click beetle larva on them.
Hope it was not v..w. I would hate to lose my collection of rare Alliums.
Did you manage to take a photo of the offenders?