Let you raise silkworms in summer and autumn at ten o'clock.

I think we are still very familiar with silkworms. Sericulture has a history of thousands of years since ancient times. In ancient China, some people have planted mulberry and sericulture, so we should pay attention to certain techniques and skills in the process of sericulture.

Let you raise silkworms in summer and autumn at ten o'clock.

First, prevent pesticide poisoning. In sericulture season, do not spray insecticidal double and other organochlorine pesticides on the farmland near the silkworm room, its fumigation will lead to silkworm poisoning; silkworm mulberry leaves can be picked and fed to silkworms only after trial feeding.

Mosquito-repellent incense or mosquito or insecticide is prohibited in the silkworm room. In the housing adjacent to the silkworm room, the doors and windows of the silkworm room should also be closed to prevent silkworm poisoning.

Third, the silkworm room should install screen doors and screen windows to prevent flies from entering the silkworm room to harm the silkworm, and add "killing silkworm fly" emulsion or spraying silkworm body to kill maggots.

Fourth, before sericulture, the rat hole should be blocked, the silkworm rack and the wall should be kept at a certain distance, and the feet of the silkworm frame should be sprinkled with lime powder or silkworm medicine to prevent the rats from climbing. To raise silkworms, it is necessary to do a good job of killing rats with drugs.

Fifth, the temperature of sericulture is relatively high in summer and autumn, so it is necessary to open doors and windows and strengthen indoor ventilation. Mulberry leaves are sprayed with fresh water and a breeze is blown by an electric fan, which is also conducive to indoor cooling.

Sixth, diseased silkworms should be cleaned up in time, put into disinfection basins filled with bleach solution or lime slurry, and feed diseased silkworms to livestock and poultry to prevent the spread of pathogens and pollute the environment.

Seventh, silkworm sand contains a large number of pathogens, do not spread around the silkworm room, should be concentrated in the field or put into the dung pit retting system, in order to prevent the spread of pathogens.

Due to the high temperature in summer and autumn and the rapid reproduction of pathogens, attention should be paid to picking leaves as needed, transporting leaves in time and storing leaves reasonably. Mulberry storage ponds should be disinfected once per age, do not feed overnight mulberry leaves.

9. Wet leaves should not be fed in hot and humid weather, mulberry leaves should not be sprinkled with water, sand should be removed frequently, fresh lime powder, dried straw and other materials should be sprinkled to inhibit the growth and reproduction of bacteria.

Ten, is not sericulture season, silkworm room do not store grain, bran and other things, so as to avoid damp mites, sericulture harm to sericulture.

Preparation before sericulture

1. Mulberry planting: silkworms feed on mulberry leaves, so mulberry trees must be planted before sericulture. Please read the article "Mulberry planting Technology Video" about mulberry planting technology. Here the editor will not repeat it.

2, silkworm room: a large silkworm room needs 20 square meters, small silkworm room 10 square meters, special leaf storage room and so on, in order to prevent disease.

3. Silkworm tools: including thermometer, silkworm plaque, plastic film, silkworm net, checkered cluster, silkworm chopsticks, goose feather, mulberry cutting knife, chopping block, mulberry scissors, black cloth and so on. It takes 20 silkworm plaques, 160 square clusters and 14 small silkworm webs to raise a silkworm.

4. Disinfection of silkworm houses and silkworm tools: 7 days before sericulture, clean the silkworm houses and tools, spray and disinfect them with eliminate virus essence or 1% bleach or strong chlorine semen to use half a jin of medicine solution per square meter. Close the doors and windows after spraying and seal for more than 24 hours. At the same time, the environment around the silkworm house should be sprayed and disinfected.

The rearing method of big silkworm

1. Feeding and management: the 4th and 5th instar silkworm is called big silkworm, the optimum temperature is 25 ℃, and the difference between dry and wet is 3 ℃. Usually after the fifth instar is fed to the second leaf, the silkworms are moved to the ground. Before the silkworm goes to the ground, first clean and wash the ground, and disinfect it with bleach powder. After drying, spread a layer of lime powder on the ground, and then move the silkworm to the ground. Raise large silkworms to achieve good ventilation, strengthen disinfection, use lime powder to disinfect silkworm seats once a day (before mulberry), do not pick yellow leaves, mud leaves, soot leaves, insect bites leaves.

2, maturity characteristics: large silkworm consumption, to achieve good mulberry satiety, a piece of silkworm eggs with 500 kg of leaves, five-year-old silkworms begin to mature after 6-7 days, the characteristics of silkworm maturity is to stop eating mulberry, discharge a large amount of green soft dung, chest transparent, the body is slightly soft and shortened, showing waxen; the head swings around, and this is the appropriate time for the upper cluster.

3. Upper cluster method: the upper cluster method of square clusters is to select 4 or 5 square clusters to overlap horizontally alternately, then spread the cooked silkworms evenly on the clusters, and hang the cluster hooks after the silkworms crawl. It is necessary to maintain good ventilation during the cluster period. Generally, cocoons can be collected and sold after six days in spring silkworms and 4 or 5 days after clustering in summer and autumn.

Culture techniques of mature silkworms

When the baby silkworm reaches the end of the fifth instar, it gradually shows the characteristics of maturity: first, the excreted feces change from hard to soft, from dark green to leaf green; loss of appetite and decrease of mulberry intake; the front digestive duct is empty and the chest is transparent; then completely stop eating, the body drive is shortened, the abdomen also tends to be transparent, the silkworm head and chest is raised, the mouth spits silk strands, swings up and down to find a cocoon place, such silkworms are called mature silkworms. When people put cooked silkworms in special containers or pots, the silkworms spin cocoons, which can be divided into four processes:

1. The mature silkworm first spits out the silk, binds it to the silkworm, and then spins it to connect the surrounding twigs to form a cocoon bracket, that is, a cocoon net. The cocoon net does not have a cocoon shape, but some soft and messy cocoon silk layers, which can be used as a support for cocooning.

2. After forming the cocoon net, the silkworm continues to spit out messy silk loops, thicken the inner layer of the cocoon net, and then spin silk in an S-shaped way, and the outline of the cocoon begins to appear, which is called cocoon clothing. The silk fiber of cocoon clothing is fine and brittle, the arrangement is extremely irregular, and the sericin content is also high.

3. After the cocoon coat is formed, the cocoon cavity becomes smaller gradually, and the front and rear ends of the silkworm body bend to the back into a "C" shape. The silkworm continues to spit out cocoon silk, and the spinning mode is changed from S shape to ∞ shape, which begins the process of cocooning layer.

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

From the above analysis, we know that there are still many techniques for sericulture. Sericulturists should not blindly cultivate silkworms, but should communicate with successful breeders, learn from each other's experiences and methods, and strive to take fewer detours.