CATDOLL : CATDOLL: What are the climatic conditions for silkworm rearing?

1. What altitude is suitable for silkworm breeding?

Answer: Traditional silkworm breeding areas in my country are spread across the middle and lower reaches of the Yangtze River. From Sichuan to Jiangsu, Zhejiang and other provinces along the river, there is a tradition of silkworm breeding, so there is no specific requirement for the altitude of silkworm breeding. As long as the area is suitable for the planting and growth of mulberry leaves, the sericulture industry can be developed. However, silkworms are more suitable for warm and humid climate conditions. High temperature, drought and cold areas are not conducive to the growth of mulberry trees, nor are they suitable for the development of silkworms.

2. What is the suitable temperature for silkworms?

The temperature for silkworm development is 7-40℃, and the optimum temperature for feeding is 20-30℃. Silkworms are metamorphosis insects, and the most common one is the mulberry silkworm, also known as the silkworm, which is one of the economic insects that spins silk and spins cocoons and feeds on mulberry leaves.

Silkworms feed on mulberry leaves, and their bodies turn white after eating them continuously. 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 like they are sleeping. This is called "hibernation."

After molting once, it is the second-instar larvae. It grows one year older each time it molts. The larvae molt four times in total and become fifth-instar larvae. They then eat mulberry leaves for 8 days to become mature silkworms and start spinning silk cocoons. Extended information: Some characteristics of silkworm eggs, larvae (silkworm babies), silkworm pupae, and silkworm moths can be used to identify the sex of the silkworm. However, the most widely used method is to identify the sex of old silkworms, silkworm pupae, and silkworm moths.

The most reliable feature for identifying the sex of silkworms is the eighth and ninth abdominal segments. Female silkworms have four transparent spots on the eighth and ninth abdominal segments, while male silkworms have a transparent spot in the middle of the ninth abdominal segment. However, generally speaking, it is most difficult to distinguish the sex of silkworms during the larval stage. Except for senior technicians, ordinary silkworm farmers often find it difficult to distinguish.

The characteristics of male and female pupae are also identified by utilizing the structure of the eighth and ninth abdominal segments.

In the center of the ventral surface of the eighth and ninth segments of the female pupa's abdomen, there is a straight line that separates the eighth and ninth segments; while in the center of the ventral surface of the ninth segment of the male pupa's abdomen, there is a pair of small protrusions.

3. What is the appropriate temperature for raising silkworms?

Temperature, silkworms are cold-blooded animals.

Changes with the external temperature.

The temperature range for growth is 20 to 30 degrees Celsius.

The higher the temperature within the suitable temperature range, the better the growth and development.

Fast, above 30 degrees Celsius and below 20 degrees Celsius

Under this condition, the silkworms develop slowly, which is not conducive to the

Growth, long contact time will affect the health of silkworms.

The optimum temperature for raising young silkworms at 1 to 2 years old is 27 to 28 degrees.

The best temperature for aging is 26 degrees Celsius.

The optimum temperature for raising silkworms is 24 to 25 degrees Celsius.

The temperature for raising young and adult silkworms should not exceed 30

The young silkworms are kept in a high temperature environment of 27 to 28 degrees Celsius.

Feeding under the water, eating more mulberry, digestion and absorption are accelerated,

The silkworms gain weight and are healthy.

Celsius low temperature feeding mulberry long time, accumulation of breeding

The silk glands are full and enlarged, with more silk material and cocoons.

Layer thickness.

4. What is the climate for silkworm growth?

The most suitable temperature for the young silkworms (1-3 years old) is 26~29℃, and the suitable humidity is above 85%.

The most suitable temperature for adult silkworms (4-5 years old) is 25℃. The surrounding environment requires fresh air and ventilation.

5. What kind of climate conditions are suitable for silkworms to grow in?

After receiving the silkworm eggs, place them in the prepared silkworm rearing box. The silkworm box can be made of ordinary paper boxes, but it must be clean and odorless. From the day the silkworm eggs are shipped out of the warehouse, they will naturally hatch into silkworms in about 11 days at room temperature of 21-29 degrees Celsius.

Silkworms have a strong appetite. They eat mulberry leaves day and night, so they grow very fast. They have suction cups on their feet that can stick to rough objects. When the color of their heads turns black, it means they are about to molt.

After completing four molts, their bodies turn light yellow and their skin becomes tighter, indicating that they will wrap themselves in a silk cocoon and transform into a pupa in the cocoon.

Additional information

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 cocoons. The silkworm originated in China, and its development temperature is 7-40℃, and the optimal temperature for breeding is 20-30℃.

Silkworms feed on mulberry leaves. After continuously eating mulberry leaves, their bodies turn white. After a period of time, they begin to shed their skins. They shed their skins for about a day, and they do not eat or move, just like sleeping. This is called "hibernation". After molting once, they become second-instar larvae. Each time they shed their skin, they grow one year older. The larvae shed their skins four times in total, becoming fifth-instar larvae. After eating mulberry leaves for another eight days, they become mature silkworms and begin to spin silk and make cocoons.

6. What is the most suitable temperature for raising silkworms?

① Temperature. Silkworms are cold-blooded animals. Their body temperature changes with the change of external temperature. The temperature range for normal growth and development of silkworms is 20-30 degrees Celsius. The higher the temperature within the suitable temperature range, the faster the growth and development. When the temperature exceeds 30 degrees Celsius and is below 20 degrees Celsius, the development speed of silkworms is slow, which is not conducive to the growth of silkworms. Long contact time will affect the health of silkworms. The suitable temperature for raising young silkworms from 1 to 2 years old is 27-28 degrees Celsius, and 26 degrees Celsius is suitable for the third age. The Silk Quilt Network recommends that the suitable temperature for raising adult silkworms is 24-25 degrees Celsius. It is better to raise young and adult silkworms at a temperature not exceeding 30 degrees. Young silkworms are raised under high temperature conditions of 27-28 degrees Celsius, eat more mulberry, digest and absorb faster, gain weight, and are healthy. Adult silkworms are raised under low temperature conditions of 24-25 degrees Celsius, eat mulberry for a long time, accumulate more nutrients, have full and hypertrophic silk glands, have more silk substances, and have thick cocoon layers. ② Humidity. The humidity in the environment can affect the growth, development, mulberry food intake, digestion and absorption, molting, and silkworm hygiene. In a humid environment, silkworms breathe vigorously, eat more mulberry, digest and absorb faster, grow and develop faster, and have a short lifespan. However, high humidity can cause pathogenic microorganisms to reproduce quickly, and silkworms are susceptible to infection and disease. A dry environment is beneficial to the hygiene of the silkworm's body, but the mulberry leaves are easy to wither and affect their mulberry intake, causing hungry silkworms, thin silkworms, and difficulty in molting. Therefore, it is better to keep the air moist and the silkworm's body dry. The suitable humidity range is that the relative humidity of the young silkworms is 90% in the first age, and then decreases by 5% for each age, and the fifth age for adult silkworms.

7. What climate is suitable for raising silkworms?

Grain Full is warm, neither too hot nor too cold. At this time, summer crops are already full of grain, and various green plants are flourishing, especially mulberry leaves. Warm climate and abundant food are the most suitable season for silkworm breeding. The characteristics of spring silkworm breeding are mild weather and good leaf quality. The cold weather in winter kills some pathogens, the environment is clean, and it is easy to obtain high-quality and high-yield silkworms. However, the temperature is often low during the young silkworm period, which cannot meet the requirements of young silkworm breeding and needs to be heated. The probability of hot and humid weather in early June is high.

Therefore, spring silkworms must be raised as fully and well as possible to achieve high-quality and high yields; spring silkworms should not be raised too late to avoid encountering bad weather in the later stage; at the same time, dark fire heating should be implemented during the young silkworm period.

The amount of spring silkworms that can be raised can be estimated by using 650-700g (buds and leaves) of mulberry per box of silkworm seeds.

8. What are the growth environment requirements for silkworms?

Temperature: The temperature range for silkworm growth and development is 20-30℃. The suitable temperature for feeding and rearing is usually 27-28℃ for the first instar, 26-27℃ for the second instar, 25-26℃ for the third instar, 24-25℃ for the fourth instar, and 23-24℃ for the fifth instar. It should be kept at 24.5-25℃ in the early stage of cocooning and 24℃ in the late stage of cocooning. Humidity: The relative humidity is 95% in the first instar, and it decreases by 5-6% with each subsequent instar.