A silkworm's life goes through more than 50 days: silkworm eggs, ant silkworms, mature silkworms, cocoons and moths.

The young silkworm just hatched from the egg is as black as an ant. We call it "ant silkworm". When the eggshell is empty, it turns white or light yellow, and the body is covered with fine hair, which is not obvious for about two days. Ant silkworms have an appetite after hatching for about 40 minutes.

The amount of mulberries is very large, so it grows quickly and its body color gradually fades. From ant silkworm to cocoon spinning * * * molting for 4 times.

Second, the spinning process

1. Mature silkworms spit out their own silk first, then stick it on the cocoon catcher, and then connect the surrounding cocoon-forming branches to form a cocoon-forming bracket, that is, a cocoon-forming net. The cocoon net has no cocoon shape, but some soft and messy cocoon silk layers as the support for cocoon formation.

2. After the silkworm forms a cocoon web, it constantly spits out messy silk loops, thickens the inner layer of the cocoon web, and then spins in an S-shape, and the outline of the cocoon begins to appear, which is called a cocoon clothing. The silk fibers in cocoon shell are thin and brittle, with extremely irregular arrangement and high sericin content.

3. After the cocoon layer is formed, the cocoon cavity gradually becomes smaller, and the front and rear ends of the silkworm body bend backward to form a "C" shape. Silkworms continue to spit out cocoon silk, and the way of spinning silk is transformed from s to infinity, and the process of cocoon formation begins.

4. When the silkworm's body is greatly reduced due to a large amount of spinning, the swinging speed of the head and chest slows down, and there is no certain rhythm, and the spinning begins to appear messy, forming a loose and soft cocoon silk layer, which is called pupa lining.

Extended data:

Breeding measures:

1, disinfection?

On the basis of planting mulberry leaves, silkworm rooms and equipment should be prepared. Seven days before sericulture, spray 1% strong chlorine essence for disinfection, and use half a catty of liquid medicine per square meter. Seal for more than 24 hours after spraying. At the same time, the environment around the silkworm house should be sprayed and disinfected.

2. silkworm eggs?

Silkworms reproduce with eggs, which are like fine sesame seeds, about 1 mm wide and about 0.5 mm thick. A female moth can produce 400-500 silkworm eggs, and1700-2000 silkworm eggs weigh about1g.

The color of silkworm eggs, which is light yellow or yellow at first, changes to light red bean color and red bean color after 1~2 days, and turns to grayish green or purple after 3~4 days, which is called color fixing.

The outer layer of silkworm eggs is a hard eggshell with yolk and serosa inside. Embryos in fertilized eggs constantly absorb nutrients during development and gradually develop into ant silkworms, which crawl out of the eggshell and turn white or light yellow after the eggshell is empty.

3. green?

On the eighth day or so, a small black spot called Dianqing can be seen at one end of silkworm eggs. If a silkworm egg is 20% blue, cover it with black cloth. From the day of Yunnan celebration, take off the black cloth at 5 am on the third day and turn on the light to hatch.

4. Ant silkworm?

Silkworm babies just hatched from eggs are black as ants and are called "ant silkworms". Its body is covered with fine hair, and the hair will not be obvious in about 2 days. The ant silkworm has an appetite about 40 minutes after hatching, so it should start feeding.

5. collect ants?

After 3~4 hours of exposure, the spring silkworm can pick ants at 9 am, and the summer and autumn silkworm can pick ants at 7~8 am. Cut the first spreading leaf of mulberry into 0.5 cm cubes and sprinkle it on a dustpan covered with plastic film. Hold the silkworm egg paper in one hand and the silkworm chopsticks in the other, and pat the back of the silkworm egg paper evenly to make the silkworm eggs fall off the dustpan. Then scrape the silkworm eggs with goose feathers and form a circle.

6. Hibernate?

Silkworm babies feed on mulberry leaves (they can also eat other leaves to survive). Eating mulberry leaves continuously turns your body white. After a while, they began to shed their skin. When they molt, they will sleep for a day or so. This is called "hibernation".

Baidu encyclopedia-spring silkworm