To get high quality silk, silk farmers will kill the silkworms once the cocoon is completely formed. This is because silk will spend 16 days transforming into a Bombyx mori moth after it has spun its cocoon, which will excrete a fluid that dissolves a hole in the silk. So, people will timely kill silkworms

Is A Silkworm An Insect

Silkworm, the larva or caterpillar of the Bombyx mori moth, is an economically important insect, being a primary producer of silk. Related Posts Are Silk Worms Harmful Which Insect Makes Silk Difference Between Thai Silk & Manufactured Silk Does Silk Come From Worms Methods to Identify Real Silk   Related Products