CATDOLL : CATDOLL: What should be paid attention to when raising silkworms in the north? (What conditions are required for raising silkworms in the north)

1. What should we pay attention to when raising silkworms in the north?

Things to note when raising silkworms

1. The silkworms are very small and have dark black bodies. When feeding them mulberry leaves, it is best to pick the tender mulberry leaves. It is also best to cut a small piece with scissors to make it easier for the silkworms to eat.

2. When the silkworms grow up a little, the mulberry leaves do not need to be cut, but the tender leaves are still the main ones, which is convenient for the silkworms to eat. They are now slightly white. Since the mulberry leaves are tender, they dry very quickly, so pay attention to adding leaves in time.

3. The silkworms eat more vigorously, grow faster, and have a good appetite, so it is easy to reach the time of molting. That is, the silkworms do not move much, and then begin the process of molting. Don't think it is sick and rub it.

4. After the fourth molting, the silkworm's body has become more transparent and is ready to start spinning silk. After about 5 days, the cocoons can be harvested.

5. Silkworms basically spend their entire lives eating. For those who raise silkworms in cities, the most troublesome thing is the mulberry leaves. If there are some in the garden, it is best to pick them. If not, you can buy them online or in the local market. Before feeding mulberry leaves, please be sure to wash the leaves, wipe them dry and then feed them to the silkworms, so that they are not prone to diarrhea or even death.

6. If it is difficult to obtain mulberry leaves, you can go out and pick them, pack them up, sprinkle some water on them and put them in the refrigerator to keep them fresh. This way, the silkworms can eat mulberry leaves every day. If there are really no leaves, you can also feed them some vegetable leaves, such as camphor leaves or lettuce leaves.

7. If you find that silkworms are not allowed to eat for several consecutive days, and it is a collective state, then you should pay attention to two issues. One is the hygiene of the mulberry leaves, whether they are washed clean, whether there are pesticides, etc. The other is whether the mulberry leaves have moisture and are not wiped dry, which will cause the silkworms to get sick. If none of these are present, you need to consider the surrounding environment. Too fragrant, too humid, or too dry is not good. Young silkworms have strong resistance to high temperature and humidity. Generally, the silkworm room is maintained at 25-28℃ and the relative humidity is 75%-80%. Adult silkworms are suitable for an environment with slightly lower temperature and humidity and good ventilation. Generally, the silkworm room is maintained at 23-24℃ and the relative humidity is 60%-70%.

2. When raising silkworms in the north, can the silkworm eggs of the current season continue to be hatched?

Yes. 1. Clean and disinfect the room before raising silkworms. Clean and plug holes. When raising young silkworms, pay more attention to thorough disinfection and disease prevention. Wash your hands before picking and feeding leaves. Strictly control the standard temperature, humidity, mulberry leaf standards and feeding time.

2. The professional term for silkworm egg hatching is "inducing green", which refers to the technical process of protecting silkworm eggs under suitable temperature and humidity conditions to allow silkworm embryos to develop and hatch into small silkworms. The specific method is: in a disinfected silkworm room, spread the silkworm eggs flat on the silkworm plaque with the eggs facing up. The room temperature for the first to fourth days is required to be 24 degrees, with a dry-wet difference of 2-2.5 degrees; the room temperature for the fifth to tenth days is required to be 27 degrees, with a dry-wet difference of 1.5-2 degrees. When the silkworm embryos develop to the later stage and a few silkworm eggs are found to have small blue dots, immediately cover the silkworm eggs with black cloth. After about 40 hours, that is, 4-5 o'clock before dawn on the third day, remove the black cloth, wrap the silkworm eggs with white paper, with the eggs facing up, turn on the light to allow the ants to bite through the egg shells and hatch. After about 30-40 minutes after the silkworms hatch, you can start feeding them.

3. Collecting ants The professional term "collecting ants" means collecting the hatched ants and moving them to the silkworm bed paper for feeding. In general, in urban families, silkworms can still spin silk and make cocoons without this step.

4. For feeding, you need to find a sterilized plastic or wooden flat box, which should be the same shape and depth as the usual vegetable plate at home.

The growth process of silkworms:

① Silkworms feed on mulberry leaves. After continuously eating mulberry leaves, their bodies gradually turn white. After a period of time, they begin to shed their skins. The molting period lasts for about a day, and they do not eat or move, just like sleeping. The term is called "sleeping". After molting once, they become second-instar larvae. The larvae grow one year older each time they molt. They molt four times in total, and become fifth-instar larvae in about 6-8 days. After the fifth instar, they begin to spin silk and make cocoons.

② It takes the fifth-instar silkworm two days and two nights to make a cocoon, and the silk used to make the cocoon can be 1.5 kilometers long. The fifth-instar larvae shed their skin for the last time (fifth time) in the cocoon and become pupae.

③ After about 7-10 days, the pupa turns into a silkworm moth and emerges from the cocoon. After emerging from the cocoon, the female moth emits a smell from its tail to lure the male to mate. After mating, the female moth lays about 500 eggs in about 4-5 hours and then slowly dies.

3. Is the north suitable for silkworm breeding?

The climate in the north is not suitable for raising silkworms. Silkworms are metamorphic insects, and the most common one is the mulberry silkworm, also known as the domestic silkworm, which is one of the economic insects that spins silk and spins cocoons on mulberry leaves. Its development temperature is 7-40℃, and the optimal temperature for breeding is 20-30℃. Silkworms are mainly distributed in temperate, subtropical and tropical regions. The Pearl River Delta region in my country is rich in silk. In addition to the Pearl River Delta, the main silk producing areas in my country include the East China Plain and the Sichuan Basin.

4. How many times a year can silkworms be raised in the north?

In the natural environment, silkworms can be raised twice a year, but in the artificial breeding environment, the number of breeding times will increase, and the number of times silkworms are raised in different regions is also different. In the Yangtze River Basin, silkworms can be raised 4-5 times a year from late April to mid-to-late October; in North China, silkworms can be raised 2-3 times a year from May to September; in the Pearl River Basin, silkworms can be raised 7-8 times a year from March to November each year.

5. Is the climate in the north suitable for silkworm breeding?

The climate in the north is not suitable, so silkworms are more common in the south.

Reason 1: Silkworms are metamorphosed insects. The most common one is the mulberry silkworm, also known as the domestic silkworm, which is one of the economic insects that spins silk and makes cocoons based on mulberry leaves. The mulberry tree is native to central my country and is now widely cultivated in various parts of the north and south, especially in the middle and lower reaches of the Yangtze River. The leaves are feed for silkworms. It can be inferred that sericulture has a long history in the south of the Yangtze River. Therefore, sericulture should be more common south of the Yangtze River than in the north.

Reason 2: The climate in the south is suitable for sericulture. It can be seen from the historical locations of sericulture that, on the basis of traditional sericulture technology, all regions attached importance to seed production. During the Qing Dynasty, Jiangsu, Zhejiang, Sichuan, Hunan, Hubei, Guangdong, Guizhou and other places had local silkworm varieties suitable for local ecological conditions. Among them, the excellent varieties in Yuhang, Xinchang, Xiaoshan and other places in Zhejiang were more famous, and later became the manufacturing bases of modern silkworm seeds.

6. What is the largest silkworm breeding base in northern China?

A delegation of party and government officials from the Front Command of Aid to Xinjiang of Shanxi Province and the 105th Regiment of the Sixth Agricultural Division of the Xinjiang Production and Construction Corps, led by Ding Yongping, Secretary of the Party Committee of the Front Command of Aid to Xinjiang, conducted a three-day inspection in our city.

On the afternoon of March 25, Zhang Zhichuan, secretary of the municipal party committee, met with the delegation. Zhang Zhichuan, on behalf of the municipal party committee and municipal government, first welcomed the visit of the provincial front-line headquarters for aiding Xinjiang and the party and government delegation of the 105th Regiment of the Sixth Agricultural Division of the Xinjiang Production and Construction Corps, and briefly introduced the city's economic and social development and aid to Xinjiang. Zhang Zhichuan pointed out that Jincheng is rich in natural resources, outstanding people and beautiful scenery, and has four firsts in the country: it has a long history of mulberry planting and silkworm breeding, and is the largest silkworm breeding base in northern China. The Lu silk produced is famous both at home and abroad; there are 117 Ming and Qing castles, which are well preserved and have great development potential; it is the largest coalbed methane development and utilization base in the country, and its coalbed methane production accounts for half of the country; it has rich anthracite resources, and its proven reserves account for a quarter of the country. Orchid charcoal is famous at home and abroad. Jincheng has beautiful mountains and clear waters, a suitable climate, and the forest coverage rate ranks first in the province. It is a good place to live, work and travel.

7. Is Northeast China suitable for silkworm breeding?

Silkworms can be raised in most areas of the north. In the north, it is called tussah silkworms, and the leaves of the tussah tree are used as food for the silkworms.

The silkworm is an insect that spins silk and spins cocoons and feeds on oak leaves. It belongs to the order Lepidoptera, family Bombyx mori, and is native to China. The growth temperature is 8-30℃, the optimum growth temperature is 11-25℃, and the most suitable temperature is 22-24℃. It is mainly distributed in China. It is also distributed in small quantities in North Korea, South Korea, Russia, Ukraine, India, Japan, etc.

8. How many times a year can silkworms be raised in the north?

Summer in the north is short, only three months, so silkworms can only be raised once.

9. How to raise silkworms in the north?

Silkworms are fed with mulberry leaves. Autumn silkworms can be raised in the south because mulberry leaves are also available, but they cannot be raised in the north. However, if you are raising silkworms for fun, you can try feeding them lettuce leaves to see if it works.

10. In which month does silkworm breeding begin in the north?

Silkworms are raised in the north in spring and summer, which is related to the growth cycle of mulberry trees.