Friday Cat-erpillar Blogging: Living With Cocoonase

Silkworm Cocoon, Post-Adult Emergence
Photo: jneal

Silkworm larvae spin a very tight cocoon, a protective case where pupation occurs. The adult moth emerges inside the cocoon and must then escape. How?

Butterflies and moths have long coiled sucking mouthparts, unsuitable for making an exit hole in the cocoon. What other options are available? Enzymes! The cocoon of the silk moth is made of silk which is a protein. Proteins can be digested by proteases that hydrolyze the bonds between amino…

Source: Living With Insects Blog

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