why is it necessary to kill pupae by boiling cocoons in water at right state/ time.
It is necessary to kill pupae by boiling cocoons in water because,
if the pupae in the cocoons are not killed, they can develop into a silk moth and by this, the silk could not be obtained.
The cocoons are very salty
if the pupae in the cocoons are not killed, they can develop into a silk moth and by this, the silk could not be obtained.
The cocoons are very salty