It is necessary to kill the pupa by boiling cocoons in water at write time why
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Answer:
It contains lot of salt in it.
Explanation:
The Chinese people simply leveraged a natural phenomenon. A silkworm eats leaves and grows, then spins a cocoon. The next step is unwinding the cocoons. The cocoons are heated to kill the pupae, this must be done at the right time, otherwise, the pupae may emerge as moths, and moths will make a hole in the cocoons, which render the cocoons useless for reeling.
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