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How many days is the growth cycle of silkworms generally?

General News By Sophie Bennett 0 views
The growth cycle of silkworms is about forty-plus days, and their development is related to temperature, humidity, food and so on. Generally, the incubation period is 10-11 days, and the larval stage is about 25 days. Specifically, the first instar is 4-5 days; the second instar is 3-4 days; the third instar is 4 days; the fourth instar is 6 days; the fifth instar is 7-9 days;

The growth cycle of silkworms is about forty-plus days, and their development is related to temperature, humidity, food and so on. Generally, the incubation period is 10-11 days, and the larval stage is about 25 days. Specifically, the first instar is 4-5 days; the second instar is 3-4 days; the third instar is 4 days; the fourth instar is 6 days; the fifth instar is 7-9 days; the pupal stage is 14-18 days; the moth stage is 3-5 days.

How Many Days Is the Growth Cycle of Silkworms

1. Hatching of silkworm eggs: after an 8-9 day incubation period, the silkworm babies hatch from the silkworm eggs; when they first emerge they are black and small, commonly known as ant silkworms.

2. First instar: the color of first-instar silkworms changes from black to dark brown; the mulberry-feeding time is 3-4 days, and the amount eaten is not large. After entering the molting period, they will shed their skin for the first time, and the molting period lasts 8-12 hours.

3. Second instar: the silkworm body grows noticeably larger and the color becomes lighter; the mulberry-feeding time is about 3 days, and the molting period is 8-12 hours.

4. Third instar: the silkworm body color turns light brown, and the amount eaten begins to increase; after about 4 days they enter the molting period. Silkworms in the 1st-3rd instars are generally called small silkworms, and after 10-14 hours they enter the large-silkworm stage.

5. Fourth instar: silkworms that have entered the large-silkworm stage develop very quickly, and the amount eaten increases noticeably. The fourth instar generally lasts 5 days, and the molting period is very long, generally called the large molting period, which can last 30-40 hours.

6. Fifth instar: this is the period when mulberry silkworms eat the largest amount of leaves; the amount eaten in about 7 days accounts for more than 75% of the total leaf consumption. After 7 days, the silkworm body begins to shorten and become bright, commonly known as a mature silkworm; mature silkworms stop eating and begin to spin silk and form cocoons.

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