What larvae eats cashmere sweaters?

No Larvae eats Cashmere wool as such. But it depends if its 100% cashmere or not. if its 100% cashmere then no larvae eats it. But you need to keep it clean as sometimes some food drops on cashmere and due to this some insects can also harm cashmere. Simple care for cashmere is, keep them clean and when not in use seal in a plastic bag.