We all know that silkworms go through four growth stages: eggs, worms, pupae and moths. The pupa is when the silkworm grows to a certain stage, spins silk and wraps itself inside to hibernate, and waits until the temperature is suitable to break out of the cocoon. The adult moth emerges and begins the next life cycle.

The black core in the middle of the silkworm chrysalis is the embryo of the silkworm. The white substance in the chrysalis is the nutrient for the embryo of the silkworm. Because the silkworm that has formed a pupa no longer eats, it depends entirely on eating these white nutrients. Survive, and when the embryo grows up, it will break out of the cocoon, which is similar to the yolk and egg white of an egg.

The black core in silkworm chrysalis tastes hard and does not have any strange smell. However, because the protein content of silkworm chrysalis is relatively high, people with allergies are likely to have allergic reactions if they eat it. Many people are fine eating the outer white part of the cocoon, but eating the black core may cause allergic reactions or discomfort. Therefore, if you feel uncomfortable or have an allergic reaction after eating the black core of the cocoon, you can remove the black core before eating.

How to choose cocoons

Cocoons are now sold in the market all year round. Except for autumn and winter, which are on the market in season, there are many cocoons in other seasons. It is stored in a controlled atmosphere warehouse, because only if the temperature is controlled well, the cocoon will not break into a butterfly.

The yellow pupa in the cocoon is smaller than the black pupa, and the skin is thinner, so the price of the yellow pupa is more expensive than the black pupa, but in terms of taste, in addition to the thick skin and thin skin Apart from the difference in thickness, there is not much difference, so you can buy it according to your needs.

When selecting cocoons, you should pick up the cocoon and lift its tail. If the head of the cocoon twists back and forth, it means it is a live pupa. Only such cocoons can be eaten with confidence. If the cocoons do not move, it means they are dead. Such stale cocoons can easily deteriorate, so it is best not to buy them.