CATDOLL : CATDOLL: When is the best time to raise silkworms in Northeast China?

1. Which month is it best to raise silkworms?

March-June.

The most suitable time for raising silkworms is generally March in spring and May and June in summer.

March is the time when mulberry leaves sprout and grow leaves. Spring silkworms at this time have tender mulberry leaves to eat. With sufficient mulberry leaves to feed on, the silkworms grow bigger and fatter.

2. When is the autumn silkworm breeding time in Northeast China?

Spring silkworm breeding begins around April 20th every spring, with a growth cycle of 26-27 days. Summer silkworm breeding begins around May 20th, and after the mulberry trees grow new leaves again, late autumn silkworm breeding begins around June 25th, with a growth cycle of 24-25 days. As the interval between Mid-Autumn silkworms and late autumn silkworms is short, and poor disinfection may affect their growth and quality, Mid-Autumn silkworms are generally not raised. Late autumn silkworms are generally bred starting around September 5th and ending in early October.

3. When does one start raising silkworms in the north?

In April, because the mulberry leaves have grown.

Silkworm, also known as domestic silkworm, is one of the economic insects that feed on mulberry leaves and spin silk cocoons. It belongs to the order Lepidoptera, family Bombyx mori. Silkworm originated in China. Its growth temperature is 7-40℃, and the optimal temperature for breeding is 20-25℃. It is mainly distributed in temperate, subtropical and tropical regions.

The life cycle of a silkworm goes through the stages of egg - larva - mature silkworm - cocoon - silk moth, a total of more than fifty days.

The silkworms that have just hatched from the eggs are black like ants. We call them "ant silkworms". Their bodies are covered with fine hairs, which will no longer be obvious after about two days. The ant silkworms will have an appetite about 40 minutes after hatching, and the feeding process will begin at this time.

Additional information:

Note: To prevent diseases and insect pests, pay attention to disinfection before and during silkworm rearing, prevent diseases from feeding silkworms starting from the 2nd age, and prevent flies and maggots from the 3rd age; prevent stuffiness and prevent hot winds; to prevent hungry silkworms, feed less and more frequently, and feed more at night when it is cool; remove sand once a day from the 3rd age.

Collect the ants on time at 8 or 9 in the morning, and feed them as you collect them; feed the silkworms with cut leaves when they are about to sleep, feed them in small amounts but frequently, add a net to lift the silkworms to stop mulberry, and let them sleep after they have eaten their fill; the room temperature for young silkworms should not be higher than 30℃, and for adult silkworms should not be higher than 27℃; summer silkworms should be released more sparsely than spring silkworms; give them appropriate amounts of leaves and keep them fully fed.

The treatment of dormancy should be timely. Add dormancy nets earlier than spring silkworms. If the silkworms are not fully developed, they should be raised in batches. Raise them in batches to shorten the mulberry stop time and make them go to sleep smoothly. Put them on the cocoon at the right time. When the silkworms are old, they should be selected in batches and put them on the cocoon sparsely. Open the doors and windows 3 days after putting them on the cocoon to remove moisture and protect the cocoons, but avoid strong wind blowing directly. It is better to feel a slight breeze on your face.

4. How to breed Northeast Oak Silkworm?

Tussah silkworms are usually raised in the mountains. Fall is different from spring. Since the temperature is higher in early fall and then gradually decreases, you should choose the shade of the mountain at the beginning to avoid strong sunlight. When it comes to making cocoons, the climate has become cold, so you need to move to the sunny side of the mountain. In addition, a tree can generally be eaten for 15 days, and then you have to move to the next tree. Don't move trees too frequently, otherwise it will affect the formation of cocoons.

5. In which month do we usually start raising silkworms?

Spring silkworms are generally raised from April to June each year, summer silkworms are generally raised from June to July each year, early autumn silkworms are generally raised from July to August each year, mid-autumn silkworms are generally raised from August to September each year, and late autumn silkworms are generally raised from September to October each year.

6. When will the autumn silkworm harvest in Northeast China end?

The Northeast autumn silkworm breeding takes 2 months, from August to October.

Silkworms are animals of the order Lepidoptera and family Bombyx mori. They are found in temperate, subtropical and tropical regions. They are native to China, and are commonly known as silkworms or mothers in southern China and Taiwan. Silkworms feed on mulberry leaves, and their bodies turn white after continuously eating mulberry leaves. They then spin silk to form cocoons, and finally break out of the cocoons to become moths.

7. What is the best time to breed silkworms?

It is best to start growing the mulberry trees after May 1st, because the leaves are already very large at that time and picking them will not affect the growth of the trees. However, you should still grow less at first and gradually grow more.

1. Living habits: Silkworms are metamorphosis insects, the most common of which is the mulberry silkworm, also known as the domestic silkworm, one of the economic insects that feeds on mulberry leaves and spins silk and makes cocoons. The mulberry silkworm originated in China, and its development temperature is 7-40℃, and the suitable temperature for breeding is 20-30℃. Silkworms feed on mulberry leaves, and their bodies turn white after eating mulberry leaves continuously. After a period of time, they begin to shed their skins. The molting lasts for about a day, and they do not eat or move like sleeping. This is called "hibernation". After molting once, it is a second-instar larva. It grows one year older every time it molts. The larvae molt four times in total, becoming fifth-instar larvae, and then eat mulberry leaves for 8 days to become mature silkworms, and begin to spin silk and make cocoons.

2. Distinguish between male and female:

Some characteristics of silkworm eggs, larvae (silkworm babies), pupae, and moths can be used to identify the sex of silkworms. However, the most widely used method is to identify the sex of old silkworms, pupae, and moths.

The most reliable feature for identifying the sex of silkworms is the eighth and ninth abdominal segments: there are four transparent spots on the ventral surface of the eighth and ninth segments of female silkworms; there is a transparent spot in the center of the ventral surface of the ninth segment of male silkworms.

The characteristics of male and female pupae are also used to identify the structure of the eighth and ninth abdominal segments. In the middle of the ventral surface of the eighth and ninth abdominal segments of the female pupa, there is a straight line that separates the eighth and ninth abdominal segments; while in the middle of the ventral surface of the ninth abdominal segment of the male pupa, there is a pair of small protrusions and an x-shaped symbol.

As for distinguishing male and female moths, in addition to identifying features such as antennae and abdomen size, the most reliable way to identify male and female moths is by their external genitalia. For example, the female moth has a black bone plate near its mating hole, and the male moth has a pair of claspers.

8. Can we still raise silkworms in summer, autumn or winter?

Yes. Silkworms can be raised all year round in the south, but not in the north. They can only be raised in the summer in the north because it is too cold in the north and mulberry trees cannot grow. Things to pay attention to when raising silkworms in summer and autumn: 1. Prevent pesticide poisoning. Do not spray organic pesticides such as insecticides in the silkworm room and farmland near the mulberry field during the silkworm raising season. The smell will cause poisoning to the silkworms; mulberry leaves must be tested and confirmed to be non-toxic before feeding silkworms. 2. Mosquito-repellent incense or mosquito repellents and insecticides are prohibited in the silkworm room. When used in a house near the silkworm room, the doors and windows of the silkworm room should also be closed to prevent poisoning of the silkworms. 3. Screen doors and windows should be installed in the silkworm room to prevent flies from entering the silkworm room and harming the silkworms, and "silkworm fly killing" emulsion should be added or sprayed on the silkworm body to kill fly maggots. 4. Before raising silkworms, rat holes should be blocked, and the silkworm racks should be kept at a certain distance from the walls. Lime powder or silkworm medicine should be sprinkled around the feet of the silkworm racks to prevent rats from climbing up. When raising ground silkworms, drugs should be used to kill rats. 5. In summer and autumn, the temperature for silkworm rearing is high. Doors and windows should be opened to strengthen indoor ventilation. Spraying mulberry leaves with clean water and using electric fans to blow breeze indoors are also conducive to cooling the room. 6. If sick silkworms are found, they should be cleaned up in time and put into a disinfection basin containing bleach solution or lime slurry. It is forbidden to feed sick silkworms to livestock and poultry to prevent the spread of pathogens and pollute the environment. 7. Silkworm feces contain a large number of pathogens. Do not spread them around the silkworm room for drying. They should be concentrated in the wild for retting or put in a manure pit for retting to prevent the spread of pathogens. 8. In summer and autumn, the temperature is high and the pathogens reproduce quickly. Pay attention to picking leaves on demand, transporting leaves in time, and storing leaves reasonably. The mulberry storage pool should be disinfected once for each age, and do not feed mulberry leaves overnight. 9. Do not feed wet leaves in hot and humid weather. Do not sprinkle water when storing mulberry leaves. Remove sand frequently and sprinkle more fresh lime powder, dry straw and other materials to inhibit the growth and reproduction of pathogens. 10. When it is not the silkworm-raising season, do not store grains, bran and other items in the silkworm room to avoid moisture and the generation of mites, which will harm the silkworms during breeding.

9. When is the best time to raise silkworms?

Generally speaking, it is more suitable to raise silkworms in spring and summer, which is roughly between April and July. The best time to raise silkworms is roughly the same as the growth cycle of mulberry trees, because only at this time can an adequate supply of mulberry leaves be guaranteed and the silkworms can grow healthily.

The advantages of raising silkworms in spring are that the weather is mild and the quality of mulberry leaves is better, so the silkworms are of higher quality and yield. The time for raising spring silkworms cannot be too late, and it can be done around April. Otherwise, if the weather is bad later, the number of silkworms will be greatly reduced.