The weight and size of silkworms, and how long is the growth period of silkworms?

Silkworms can grow up to 6-7 cm long. Silkworms will experience four molts, each molt will grow larger, to molt the number of times to indicate the age of silkworms, generally shed four times of skin silkworms can grow to 6-7 cm, belongs to the fifth instar silkworm, the fifth instar silkworm will begin to prepare to spin silk cocoon.

Newborn ants are first-in-star silkworms, they are fragile, black, and can only eat relatively tender mulberry leaves, about 3-5 mm in length. After eating mulberry leaves, the ant silkworm will become larger and longer, and the black color on the body will fade, slowly turn white, and become a second-instar silkworm after the first molt. In the future, it will continue to grow, and the silkworms with better development can grow to 6-7 cm after the fourth molt, and can eat some old leaves.

The silkworm will appear "sleeping" every time it molts, keep it for a day without eating or drinking, at this time everyone should not think that it is sick, and to interfere with it. The back of the fifth-instar silkworm will turn yellow and transparent, and it will not eat mulberry leaves much, which indicates that it is about to start spinning silk and forming cocoons.

Handling of silkworm eggs:

The male and female silkworm moths will die one after another after mating, and we can freeze the silkworm eggs left behind, and continue to hatch the silkworms in the spring of the next year.

In fact, silkworm raising is relatively simple, and it doesn't require you to bother much. Just provide it with a clean and spacious box, ** plenty of mulberry leaves.

The size can grow up to 6-7 cm. Generally, the color of the silkworm baby is white and opaque, and when you find that the side of his breathing hole is already a little transparent, it means that he is about to start spinning silk and forming cocoons.

The silkworms I raise are also fat, fat and big to eat, but they don't spin silk.

It is estimated that it is not yet time, the general silkworms are also that big, you raise it for a while to see, maybe the season is not right, so it does not form cocoons,

It's about the length of a finger.

Generally, the growth cycle of silkworms has more than 40 days, and the length of its growth cycle is closely related to factors such as temperature, humidity, and food. The greening stage is generally 10-11 days, and the larval stage is about 25 days.

1. This is the silkworm seed that I just received. It's dark and small. It's about the size of a grain of millet.

2. After a few days, some silkworm seeds begin to turn white, and silkworm seeds should be placed in a warm place. If you buy it in the spring, you should keep it warm in a cardboard box. Then a small silkworm came out and couldn't eat many leaves, so it was enough to cut the leaves and feed them a little.

Because you don't eat much, the leaves are easy to dry out, so you should feed them often.

3. More and more silkworms are coming out, and some can be seen to be coming out soon.

4. The silkworm that molted for the first time turned white after eating mulberry leaves. Day by day, it is getting bigger and bigger, and I can eat more and more.

5. The speed of eating mulberry leaves is getting faster and faster, and the leaves are becoming more and more in short supply, and each time the skin is molted, it becomes larger. Keep it cool in your hands, don't let them go hungry, and keep feeding the leaves. Silkworm raising is hard to feed almost every three or four hours.

6. Don't eat mulberry leaves, prepare to form cocoons, and keep looking for a suitable place. The body contracted, getting shorter and shorter, and the middle stomach became fatter and fatter.

7. Finally found a suitable position for the attack, and Tusi wrapped himself in it.

8. Continue to wrap yourself, keep spinning, and keep getting smaller until a perfect cocoon is formed.

The above is the change chart of the growth order of silkworms!

The life cycle is about 55 days.

The life of the silkworm passes through the silkworm egg, ant silkworm, mature silkworm, silkworm cocoon, silkworm moth, a total of more than 50 days.

1. Silkworms reproduce with eggs. The silkworm eggs look a lot like fine-grained sesame seeds, about 1 millimeter wide and about millimeters thick. A female moth can lay about 450 500 silkworm eggs weighing about 1 gram.

When the silkworm eggs are first laid, they are pale yellow or yellow, and after 1 2 days, they turn red bean color, and after 3 or 4 days, they turn gray-green or purple again, and they no longer change, which is called fixed color.

2. The silkworm babies that have just hatched from the eggs are black and black like ants, which are called"Ant silkworms"The body is covered with fine hairs, and the hair is not obvious after about two days. The silkworms have an appetite about 40 minutes after hatching, and the feeding process begins at this time.

3. The larvae develop to the end of the last instar, and gradually stop eating mulberry, and the silkworm body shrinks and becomes slightly transparent, which is called mature silkworm. The ordinary four-sleeping silkworm matures after seven days of feeding mulberry in the fifth instar stage.

4. It takes two days and two nights for the fifth-instar larvae to form a cocoon, and the silk used to make the cocoon can be drawn to a long length! The silkworm sheds its skin for the last time in the cocoon and becomes a pupae.

5. About ten days after becoming a pupae, it will become a silkworm moth and break out of the cocoon.

Summary. The weight of the third-instar silkworm is grams.

The weight of the third-instar silkworm is grams.

Three-instar silkworm**.

Third-instar silkworm: the head is no longer black, but gray, and at the end of the third instar, the body length is about about.

Summary. Kiss and kiss; The weight of the second instar silkworm was 0 0056 g

Kiss and kiss; The weight of the second instar silkworm was 0 0056 g

The weight and body length of the second-instar silkworm are 0 42 g and 2 6 cm respectively, the length of the first-year silkworm is 2--7mm, the second-instar silkworm is about 8-12mm, the third-star silkworm is 12-19mm, the fourth-star silkworm is 19-25mm, the fifth-instar silkworm is about 1-3 days, the 3-6 days is about 6-9 days, the left is 9-12 days, which guesses the ascension is about 7cm.

The weight of the fourth-instar silkworm is about 5 grams<>

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The life of the silkworm baby is divided into four stages: eggs, larvae, pupa and moth, the silkworm that has just come out of the shell is called a young silkworm, because it is black and small, so it is also called the ant silkworm, it will shed four times in the larval period, during this period of time, the silkworm baby will grow a little longer every time the skin is shed, the body will grow a little, and it is bigger and bigger, the longer and thicker, the longer and whiter. After shedding the skin four times, it will become a fifth-star silkworm, and the silkworm baby will spin silk and form cocoons after eating mulberry leaves for a few days.