The complete metamorphosis of butterflies, moths, and some other insects involves four stages: egg, larva (caterpillar), pupa (chrysalides or cocoon), and adult. In commercial use, it refers almost entirely to filaments from cocoons produced by the caterpillar of several moth species of the genus Bombyx, commonly called silkworms. Silk is a continuous protein filament around each cocoon, and in the silk production
industry, it is freed by softening the cocoon in water. Table 1shows the world silk production by country, and China is the
The complete metamorphosis of butterflies, moths, and some other insects involves four stages: egg, larva (caterpillar), pupa (chrysalides or cocoon), and adult. In commercial use, it refers almost entirely to filaments from cocoons produced by the caterpillar of several moth species of the genus Bombyx, commonly called silkworms. Silk is a continuous protein filament around each cocoon, and in the silk productionindustry, it is freed by softening the cocoon in water. Table 1shows the world silk production by country, and China is the
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