Farmers who specialize in sericulture make a living by selling silkworm chrysalis.
It's not what the landlord said
Silkworm pupae can be eaten in many ways: male moth wine, brewed with male silkworm moths who have just opened their wings, can treat rheumatism. Silkworms are called "little immortals" when they are still green, and they are the nourishment of Gao protein. Silkworm pupae without spinning can be boiled in salt water or dried, which are very nutritious and delicious.
As for the landlord's saying that "the pupae left after silkworm rearing and silk harvesting are not easy to waste, so they will be eaten", it is impossible. Silkworms hatch into moths through spinning, and there will be no pupae.