CATDOLL : CATDOLL: What are the meteorological and environmental conditions for silkworm rearing?

1. 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.

2. What environmental temperature and light do silkworms prefer?

Silkworms are suitable for growing in an environment with a temperature range of 22-29 degrees Celsius, and their most suitable growth temperature is around 27 degrees Celsius. A silkworm eats about 25 grams of mulberry leaves in its lifetime. If you feed 40 silkworms, you only need 1 kilogram of mulberry leaves. But in the actual feeding process, some mulberry leaves will be wasted, so more mulberry leaves will be needed.

3. What temperature and humidity are required 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 silkworms develop slowly, 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 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 Celsius. 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 24-25 degrees humidity.

② Humidity: Humidity in the environment can affect the growth, development, mulberry intake, digestion and absorption, molting, and silkworm bed hygiene of silkworms. In a humid environment, silkworms breathe vigorously, eat more mulberry, digest and absorb faster, grow and develop faster, and have a short life span. However, high humidity can make pathogenic microorganisms reproduce faster, making silkworms more susceptible to infection and disease.

4. 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.

5. 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.

6. 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.