CATDOLL : CATDOLL: When is the best time to raise silkworms?

1. 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.

2. 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.

3. How long 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.

4. 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.

5. 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.

6. 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.

7. When should we 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.