Short notes on the structure of the pupa of silk moth

Short notes on the structure of the pupa of silk moth

This is the next stage of development. Initially the fully grown caterpillars stop eating and gradually withdraw towards a corner among the leaves in the feeding trays: They secrete a sticky fluid through the silk glands. The fluid comes out through a narrow pore located on the hy- popharynx of the caterpillar.

The fluid gradually comes out in the form of delicate threads which hardens on exposure to air. Gradually the number of threads coming out of the caterpillar increase and they form a covering around the body called the cocoon.