The difference between yellow cocoon and white cocoon

The difference between yellow cocoon and white cocoon is as follows:

The colors of yellow cocoon and white cocoon are different, because the color of yellow cocoon is yellow and the color of white cocoon is milky white; Moreover, the color change is caused by the types and contents of pigment substances contained on the silkworm body surface.

Cocoon refers to the cocoon of silkworm, which has different shapes, such as oval, oval-waist, spherical or spindle-shaped, or slightly shrunk in the middle, with white, yellow, light green, fleshy red and other colors, and attached with silk, fluffy.

After the silkworm becomes a pupa, you can spread a piece of white paper on the bottom of the clean and tasteless paper box and hang a layer of white paper around it. When the cocoon is put into the box, the broken silkworm moth will mate and the female moth will lay eggs on the paper.