CATDOLL : CATDOLL: Silkworm's Growth Process Record Sheet Day 9 (How to Write the Silkworm's Growth Process Record Sheet Day 9)

1. What is the growth process of silkworms?

The growth process of silkworms

1. The silkworm babies have hatched. The silkworm babies that have just hatched from the eggs are black and are called "ant silkworms". Their bodies are covered with fine hairs, which will no longer be noticeable after about two days.

2. The silkworm grows up. The silkworm feeds on mulberry leaves. After eating mulberry leaves continuously, its body turns white. After a period of time, it begins to shed its skin. The molting period lasts for about a day. It does not eat or move like sleeping. This is called "hibernation".

3. After the silkworm spins silk and molts once, it is a second-instar larva. It gets one year older each time it molts, and it has to molt four times in total to become a fifth-instar larva before it starts spinning silk and making cocoons. 4. It takes two days and two nights for a five-year-old larva to make a cocoon, and it molts for the last time in the cocoon to become a pupa. 5. About ten days after the silkworm breaks out of the cocoon, it emerges as a silk moth and breaks out of the cocoon. After emerging from the cocoon, the female moth emits a smell from its tail to lure the male to mate, and the male dies after mating. The female moth can lay about 500 eggs in about one night, and then it will slowly die.

2. What is the growth process of silkworms?

The life of a silkworm goes through the process of silkworm eggs, ant silkworms, mature silkworms, silkworm cocoons, and silkworm moths, which takes more than 40 days. The specific process is as follows: 1. Silkworms reproduce with eggs. Silkworm eggs look like fine sesame seeds, about 1 mm wide and 0.5 mm thick. When the temperature rises, the silkworm eggs begin to develop. After 7-15 days, when the silkworm eggs become transparent and the outline inside can be seen, it means that the silkworms are about to come out! 2. The silkworms that have just hatched from the eggs are black like ants. We call them "ant silkworms". They are covered with fine hairs, which will not be obvious after about a few days. Silkworms have an appetite about 40 minutes after hatching, and the feeding process should begin at this time. 3. Silkworms live on mulberry leaves. After eating mulberry leaves continuously, their bodies turn white, and they begin to shed their skin after a period of time. Silkworms do not eat or move when they sleep. They seem to be sleeping, but they are actually shedding their old skins and replacing them with new ones to continue growing. During the whole breeding process, the silkworm will molt 4 times. Each time it molts, it will not eat or move. Try not to disturb it at this time, and don't throw it away thinking it is sick. Each dormancy period of the silkworm lasts about one day. 4. After molting once, it is the second-instar larva. It will be one year older each time it molts. It will molt four times in total and become a fifth-instar larva before it starts to spin silk and make cocoons. 5. Generally, it starts to make cocoons around 25 days. When the silkworm's back is shiny, yellow and transparent, it means that it is about to spin silk and make cocoons. At this time, a cross space should be provided for the silkworm to make cocoons. It takes two days to form a complete cocoon, and complete the last molting in the cocoon to become a pupa. 6. About ten days later, it will become a silk moth and break out of the cocoon. After the cocoon, the female moth's tail emits a smell to lure the male to mate. After mating, the male dies. The female moth can lay about 500 eggs in about one night, and then it will slowly die. Living habits Silkworms are oligophagous insects. In addition to mulberry leaves, they can also eat mulberry leaves, elm leaves, grape leaves, scorzonera, dandelions and lettuce leaves, but eating these will increase the mortality rate. The nutrients necessary for silkworms include protein, carbohydrates, lipids, vitamins, inorganic salts and water. Mulberry leaves are the most suitable natural food for silkworms. After eating mulberry leaves, the larvae grow rapidly. Under suitable temperature conditions, a silkworm molts once every 6-9 days from hatching to spinning cocoons, which takes about 24-32 days in total. It eats about 20-30g of mulberry leaves (5-6.2g of dry matter). Generally, after four dormancy and molting, the weight increases by about 10,000 times when it grows to the extreme. Spinning silk and making cocoons is an instinct of mulberry silkworms to adapt to the environment and survive. Mulberry silkworm cocoons can be reeled into silk, which is a precious textile raw material and is also widely used in military industry, electrical engineering and other fields. Silkworm pupae, moths and silkworm feces can also be used comprehensively. They are raw materials for many chemical and pharmaceutical industries, and can also be used as nutrients for plants. Silkworms are holometabolous insects. In one generation, they go through four developmental stages: egg, larva, pupa, and adult. The number of generations that occur naturally in a year is called diapause. One generation in a year is called monopodialism, two generations in a year is called dipodialism, and three or more generations in a year are called polypodialism. There are also polypodial species in tropical areas that do not diapause all year round. The temperature range for development varies with the development period, generally between 7 and 40 degrees Celsius, and the temperature range for normal development is 20 to 30 degrees Celsius.

3. What is the answer to the record of silkworm’s growth changes?

Silkworm ages are divided into: first instar 4 to 5 days; second instar 3 to 4 days; third instar 4 days; fourth instar 6 days; fifth instar 7 to 9 days; pupa stage +4 to +8 days; moth stage 3 to 5 days.

1. Silkworm eggs. Silkworms reproduce by eggs. Silkworm eggs look like fine sesame seeds, about 1 mm wide and 0.5 mm thick. A female moth can produce 400 to 500 silkworm eggs. 1700 to 2000 silkworm eggs weigh about 1 gram. The color of silkworm eggs is light yellow or yellow when they are just laid, and changes to light red bean color or red bean color after 1 to 2 days, and then changes to gray-green or purple after 3 to 4 days. It will no longer change, which is called fixed color. The outer layer of silkworm eggs is a hard eggshell, and the inside is yolk and serosal membrane. The embryo in the fertilized egg continuously absorbs nutrients during the development process and gradually develops into an ant silkworm. It crawls out of the eggshell, and the eggshell becomes white or light yellow after it is empty.

4. What is the whole growth process of Northeastern Tussah Silkworm?

The growth cycle of silkworms is about 40 days, and its development is related to temperature, humidity, food, etc. Generally, the accelerator period is 10-11 days, and the larval period is about 25 days. Specifically, the first instar period is 4-5 days; the second instar period is 3-4 days; the third instar period is 4 days; the fourth instar period is 6 days; the fifth instar period is 7-9 days; the pupa period is 14-18 days; and the moth period is 3-5 days.

How many days is the growth cycle of a silkworm?

1. Hatching of silkworm eggs: After an 8-9 day accelerator period, the silkworms hatch from the eggs. They are small and black when they first come out, and are commonly known as ant silkworms.

2. First instar: The color of first instar silkworms changes from black to dark brown. They feed on mulberry leaves for 3 to 4 days and do not eat much. They will shed their skin for the first time after entering the dormant period, which lasts for 8 to 12 hours.

3. Second instar: The silkworm grows noticeably bigger and becomes lighter in color. It feeds on mulberry leaves for about 3 days and sleeps for 8 to 12 hours.

4. Third instar: The color of the silkworm body changes to light brown, the appetite begins to increase, and it enters the dormant stage after about 4 days. Silkworms from 1 to 3 instars are generally called young silkworms, and enter the adult stage after 10 to 14 hours.

5. Fourth instar: The silkworms entering the adult silkworm stage develop very quickly and their food intake increases significantly. The fourth instar usually lasts for 5 days, with a long dormancy period, generally called the long dormancy period, which can last up to 30 to 40 hours.

6. Fifth instar: The silkworms eat the most leaves during the first 7 days, accounting for more than 75% of the total leaf intake. After the 7th day, the silkworms begin to shorten and become brighter, and are called mature silkworms. They stop eating and begin to spin silk and make cocoons.

5. How long does it take for a silkworm to grow?

The growth cycle of silkworms is generally about 40 days, which is related to humidity, temperature and food. The incubation period of silkworm eggs is about 8-9 days (if accelerated, it is about 2-9 days), the larval stage is about 25 days, the pupa stage is about 14-18 days, and the moth stage is about 3-5 days.

How many days is the growth cycle of a silkworm?

1. Hatching of silkworm eggs: After an 8-9 day accelerator period, the silkworms hatch from the eggs. They are small and black when they first come out, and are commonly known as ant silkworms.

2. First instar: The color of first instar silkworms changes from black to dark brown. They feed on mulberry leaves for 3 to 4 days and do not eat much. They will shed their skin for the first time after entering the dormant period, which lasts for 8 to 12 hours.

3. Second instar: The silkworm grows noticeably bigger and becomes lighter in color. It feeds on mulberry leaves for about 3 days and sleeps for 8 to 12 hours.

4. Third instar: The color of the silkworm body changes to light brown, the appetite begins to increase, and it enters the dormant stage after about 4 days. Silkworms from 1 to 3 instars are generally called young silkworms, and enter the adult stage after 10 to 14 hours.

5. Fourth instar: The silkworms entering the adult silkworm stage develop very quickly and their food intake increases significantly. The fourth instar usually lasts for 5 days, with a long dormancy period, generally called the long dormancy period, which can last up to 30 to 40 hours.

6. Fifth instar: The silkworms eat the most leaves during the first 7 days, accounting for more than 75% of the total leaf intake. After the 7th day, the silkworms begin to shorten and become brighter, and are called mature silkworms. They stop eating and begin to spin silk and make cocoons.

6. How to fill in the silkworm growth record sheet?

The growth record of silkworms should first record the time, secondly the temperature, and thirdly the length.