at the beginning every few days, the worms need to be moved to a clean tray with fresh food.
members of the farmer’s household must spend a growing amount of time to their bamboo trays, also because silkworms produce quite a lot of excrement and cleaning the trays is not a job for the weak-stomached. they continue feeding and moving the silkworms, dividing the colonies when the silkworms are too large or hungry for the numbers in that tray. by the fourth week, the largest of the silkworms will be more than 5 cm. long, fat, and hungry enough that they need to be fed every day.