Typically, the growth of silkworms can be divided
into 4 stages: egg stage, larvae stage, cocoon stage, and adult moth stage.
The life cycle of silkworms starts from the adult moths which have a 2-3 day lifespan for mating and laying eggs. A female moth lays about
200-500 eggs and dies later. Eggs are incubated for one week. At the beginning, the eggs are yellow and then change into dark gray before hatching into silkworms or larvae.
Larvae eat mulberry leaves
three times a day: morning, midday, and evening.
Larvae are divided into 2 groups: young larvae at 1-3 stage, and late aged larvae at 4-5 stage.
The larvae take about 20-30 days for food consumption and molting.
Cocoon & Pupa
At the age of 20-30 days, larvae’s bodies change into yellow and, at this stage, they are called mature larvae. Mature larvae are separated to build cocoons. The larvae spin silk threads to cover themselves. They take about 5-7 days to build cocoons and they trapped themselves in the cocoons for another 5-7 days in order to transform into pupas and then they become adult moths. The complete life cycle of silkworms is around 45-50 days.