Question
In which stage of its life cycle, the silk moth begins to produce silk fibre?
3rd instar larva
4th instar larva
5th instar larva
Pupa
Solution
D.
Pupa
The caterpillar larva hatches from egg of silkmoth. The full grown caterpillar larva grows into pupa. Its salivary glands now secrete a sticky fluid through a narrow pore of its spinning apparatus called spinneret situated on hypopharynx. The sticky substance turns into the fine long and solid thread of silk.
