Do the larvae attack bulbs? I thought they mostly lived near the surface but read on the internet they can attack the base of cuttings as well.
For what it is worth, I'm talking about bulbs I'm growing from seed, so tiny, few roots and one leaf like a blade of grass, the bulb being almost on the surface. Typically the leaf is severed at ground level and the bulb is full of holes.
Google tells me to use Provado Vine Weevil killer, and this seems to work as long as enough is applied. I'm also going to try its advice in the future - yellow sticky traps, a topping of sand, not using peat and better drainage, and I'll be growing some Pinguicula.