Detailed Explanation of Key Technical Points for Cooperative Rearing of Young Silkworms

As the saying goes: "Rearing young silkworms well means 70% of the harvest." For this reason, special attention should be paid to the cooperative rearing of young silkworms.

(1) Specific requirements and technical measures for cooperative rearing of young silkworms

1. The cooperative rearing room should use a dedicated young silkworm room. It needs good heat preservation and moisture retention performance, and easy ventilation. Strict disinfection should be carried out @#@250@#@ days before rearing, implementing "three disinfections and one fumigation." "Three disinfections": the first round uses lime slurry; the second round uses bleaching powder; the third round uses disinfection cleaner; "one fumigation": use toxic powder fumigation smoke.

2. Heating is uniformly provided by heated bed warming. Because heated bed warming makes the silkworm seat temperature even, provides good heat preservation, makes humidification easy, and does not produce harmful gases such as carbon monoxide and sulfur dioxide. However, it must be noted that: 2-3 days before receiving the newly hatched silkworms, the heated bed needs to be test-fired first, to understand the patterns of temperature rise, temperature drop and humidification, to expel disinfection gases and moisture from the cooperative rearing room, and to check the flue for smoke leakage.

3. Control the temperature and humidity well for each instar: generally for the 1st and 2nd instars, temperature 26-27°C, humidity 85%-90%; for the 3rd instar, temperature 25-27°C, humidity 75%-80%.

4. Expand the rearing seat in advance: because young silkworms grow rapidly, in order to let the silkworms feed fully and develop healthily, the rearing seat must be expanded in advance in conjunction with each mulberry feeding.

5. Do a good job of removal of excrement and removal before molting: removing excrement can not only keep the rearing seat clean and hygienic, but is also an important disease prevention and health care measure in the rearing process, especially in the high-temperature and high-humidity environment of young silkworm rearing, where excrement removal is even more significant.

6. Correctly administer medication to young silkworms: during the young silkworm stage, alternately use 37 bran and young silkworm anti-stiffening powder every morning and evening.

7. Pay attention to keeping mulberry leaves fresh: for the 1st and 2nd instars, use full anti-drying; for the 3rd instar, use semi anti-drying. In addition, young silkworm stage mulberry leaves are soft and tender, so after harvesting, special attention should be paid to reasonable storage of mulberry leaves to prevent wilting; usually shallow-pit flowing-water mulberry leaf storage is used.

(2) Benefits of cooperative rearing of young silkworms

1. The work of cooperative rearing of young silkworms is generally undertaken by some large silkworm rearing households. They have rich silkworm rearing experience, and young silkworm rearing is guaranteed, laying a solid foundation for silkworm farmers' harvest.

2. It is conducive to technology promotion. The joint-household cooperative rearing of young silkworms relatively narrows the scope of work on the surface, so that new sericulture technologies can be promoted and applied in a timely manner.

3. It is conducive to saving costs. Implementing joint-household cooperative rearing of young silkworms does not require every silkworm rearing household to build a dedicated young silkworm room and invest in other young silkworm equipment, reducing capital construction and also saving production costs, such as fuel, disinfection drugs, etc.