CATDOLL : CATDOLL: What is the best season to raise silkworms?

1. 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.

2. Which season is suitable for raising silkworms?

Spring or Summer

Answer 1. Silkworm rearing time: Generally, silkworm rearing takes place in spring and summer (starting around April). Silkworms mainly feed on mulberry leaves, so silkworm rearing needs to be basically consistent with the growth cycle of mulberry trees, so that there are enough mulberry leaves for silkworms to eat. 2. Silkworm rearing frequency: In Jiangsu and Zhejiang silkworm regions, silkworm rearing can be carried out theoretically from April to November each year, but generally only 3-5 times.

3. What is the general season for raising silkworms?

Silkworms are usually raised in spring and summer. The growth cycle of silkworms should be roughly the same as that of mulberry trees to ensure an adequate supply of mulberry leaves. Silkworms are metamorphosed insects, and the most common one is the mulberry silkworm, also known as the domestic silkworm, which is one of the economic insects that feeds on mulberry leaves and spins silk cocoons.

1. Spring silkworm rearing Spring silkworm rearing is characterized by mild weather and good leaf quality. The cold weather in winter kills some pathogens, the environment is clean, and silkworm rearing is easy to obtain high-quality and high-yield. However, the temperature is often low during the young silkworm period, which does not meet the requirements of young silkworm rearing and requires heating. The probability of high temperature and sultry weather in early June is high. Therefore, spring silkworms must be raised as much as possible to achieve high-quality and high-yield; spring silkworm rearing should not be too late to avoid 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 silkworm rearing can be estimated by using 650~700g (buds and leaves) of mulberry per box of silkworm seeds to estimate the number of silkworm seeds that can be reared.

2. Summer silkworm rearing The characteristic of summer silkworm rearing is that the rearing period is often the plum rain season in the Jiangsu and Zhejiang silkworm areas, which easily forms a hot and humid silkworm rearing environment. Mulberry trees are mainly used for the sparse buds and leaves that grow again after summer felling, and some of the mulberry leaves that are cut in spring or the remaining leaves during the spring silkworm period are also used. The use of summer leaves combined with sparse buds and leaves is conducive to maintaining a good tree shape. Due to the high temperature and humidity, the rearing is difficult and the quality of the cocoons is poor. Therefore, summer silkworm rearing should be properly controlled. Generally, the leaves should not exceed 4 or 5 leaves at the base of the new shoots grown after summer felling. If you raise two-stage autumn silkworms or only one-stage autumn silkworms, the rearing time should be appropriately postponed.

3. Raising silkworms in early autumn

(1) The characteristics of early autumn silkworm rearing are that the natural environment is in the season with the highest temperature in the year, prone to drought and changeable. During this period, other crops are frequently treated with insect pests, which can easily cause pesticide poisoning. It is the period of the year with the worst safety for silkworm farming and the worst cocoon quality.

(2) The mulberry leaves used for early autumn silkworms are mainly the lower leaves of mulberry branches. The appropriate use of some leaves can promote the continuous growth of branches and help improve the leaf quality of mid-autumn silkworms. However, if the leaves are excessively picked, it will inhibit the normal growth of the mulberry tree, which will inevitably affect the feeding of mid-autumn silkworms and the production of spring leaves in the following year.

4. Mid-Autumn Festival Silkworm Raising The characteristic of Mid-Autumn Festival silkworm raising is that although the natural temperature begins to drop, it still exceeds the suitable temperature range for silkworm raising. Mulberry tree growth reaches its peak. If there are consecutive high temperature and drought years, the mulberry leaves will age; if early autumn silkworms are not raised, the lower leaves will turn yellow; Mid-Autumn Festival is also a season when mulberry tree diseases and insect pests are prevalent. In some years, insects need to take away leaves, so it is a period of poor leaf quality.

5. Late autumn silkworm rearing is characterized by a significant drop in temperature, especially in the late nights when the temperature is often too low; the quality of mulberry leaves is improved due to the use of the Mid-Autumn Festival, and the amount of rearing should be determined according to the situation of the remaining leaves after the Mid-Autumn Festival. Late autumn is the last period of the year. Due to the accumulation of pathogens and the large temperature changes caused by continuous silkworm rearing, silkworm diseases are often prone to occur. At least 3 or 4 mulberry leaves should be left on the branches after the leaves are harvested in late autumn to prevent the winter buds from sprouting in autumn and affecting the yield of spring leaves in the next year.

4. Which month do we start raising silkworms?

Around April.

Generally speaking, silkworm breeding starts around April each year, specifically in spring and summer. Since the main food source for silkworms is mulberry leaves, the breeding of silkworms needs to be basically consistent with the growth cycle of mulberry trees, so as to ensure that there are enough fresh mulberry leaves for the silkworms to eat.

In the sericulture areas of Jiangsu and Zhejiang, silkworms can theoretically be raised during the eight months from April to November each year, but generally only 3-5 times.

5. When does one start raising spring silkworms?

1. Time for raising silkworms

Generally speaking, silkworm breeding starts around April each year, specifically in spring and summer. Since the main food source for silkworms is mulberry leaves, the breeding of silkworms needs to be basically consistent with the growth cycle of mulberry trees, so as to ensure that there are enough fresh mulberry leaves for the silkworms to eat.

2. Number of times of raising silkworms

The number of times silkworms are raised each year is related to the region. In the Jiangsu and Zhejiang silkworm areas, silkworms can be raised theoretically in the eight months from April (when mulberry trees sprout and open leaves) to November (when mulberry leaves turn yellow and fall off), but generally only 3-5 times a year. The silkworm areas in the Pearl River Basin raise silkworms more often than those in Jiangsu and Zhejiang, while the silkworm areas around the Yellow River and the northern regions raise silkworms less often than those in Jiangsu and Zhejiang.

2. What factors should be paid attention to in silkworm breeding?

1. Temperature

The suitable temperature for first-instar silkworms is 27-28℃, the suitable temperature for second-instar silkworms is 26-27℃, the suitable temperature for third-instar silkworms is 25-26℃, the suitable temperature for fourth-instar silkworms is 24-25℃, and the suitable temperature for fifth-instar silkworms is 23-24℃.

2. Humidity

The suitable humidity for first-instar silkworms is 80-85%, the suitable humidity for second-instar silkworms is 85-90%, the suitable humidity for third-instar silkworms is 75-80%, the suitable humidity for fourth-instar silkworms is 70-75%, and the suitable humidity for fifth-instar silkworms is 65-70%.

3. Mulberry leaf selection

(1) One-year-old silkworms: Use the third leaf from the top bud on the mulberry tree, which should be yellow with green in color.

(2) Second-instar silkworms: Use the fourth leaf from the top bud on the mulberry tree, which should be green with yellow in color.

(3) Third-instar silkworms: Use the 5th to 6th leaves from the top bud on the mulberry tree. The leaves should be light green and shiny.

(4) For fourth- and fifth-instar silkworms: Use the 7th to 15th leaves from the top bud, and the leaves must be fresh.

(5) There should be no water on the mulberry leaves.

4. Other matters needing attention

(1) When the temperature is high, you need to open doors and windows for ventilation.

(2) When raising silkworms, avoid direct sunlight.

(3) Mosquito-repellent coils should not be used in silkworm breeding areas because they are poisonous to silkworms and bees.

6. Until which month can silkworms be raised?

1. Generally speaking, the season for raising silkworms is spring and summer every year (starting around April each year). Since the main food source for silkworms is mulberry leaves, the season for raising silkworms and the growth cycle of mulberry trees need to be roughly the same to ensure that there are enough mulberry leaves to feed the silkworms.

2. The season of sericulture is related to the region. In the sericulture areas of Jiangsu and Zhejiang, theoretically, sericulture can be carried out during the eight months from April when mulberry trees sprout and open leaves to November when mulberry leaves turn yellow and fall off, but generally only 3-5 times a year. The sericulture areas in the Pearl River Basin raise sericulture more frequently than those in Jiangsu and Zhejiang, while some sericulture areas around the Yellow River or in the north raise sericulture less frequently than those in Jiangsu and Zhejiang.

7. 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.