Disinfection and disease prevention in young silkworm stage and its key techniques

Disinfection and disease prevention must be carried out from beginning to end in young silkworm co-breeding, and the technical keys of three links, namely disinfection before silkworm production, disinfection during silkworm production and disinfection at the end of silkworm production, must be carefully grasped:

1. Disinfection before silkworm production.

Based on the principle of comprehensive and thorough cleaning and effectiveness, on the basis of comprehensive cleaning, targeted agents should be used for disinfection, and the management after disinfection should be strengthened at the same time. It should be noted that:

1, cleaning water quality is good, it is strictly prohibited in the dead water ditch pond, river cleaning silkworm;

2. The garbage cleaned should be concentrated away from silkworm houses and mulberry gardens, and sealed with mud for fermentation treatment;

3. Focus on the occurrence types of silkworm diseases in the previous season or last year, carry out targeted disinfection, and achieve disinfection by stages, comprehensively and thoroughly. For example, 2% lime slurry is used for viral diseases, and "402" is used for fungal diseases; comprehensive disinfection uses disinfection, poison dissipation, bleaching powder, etc.

4. In order to improve the disinfection effect, immersion disinfection shall not be less than 1 hour, spray disinfection and moisture preservation shall be carried out for half an hour, and fumigation disinfection shall be closed for more than 24 hours (24°C). Lime slurry to use suspension, bleaching powder with clear solution, poison dissipation to fully smoke.

2. Disinfection in silkworm period.

@#@250@#@period, germs and viruses in silkworm room will gradually accumulate with personnel, mulberry leaves and air, so disinfection and disease prevention must run through the whole process, during which attention must be paid to:

1. It is essential to disinfect the silkworm body and silkworm seat powder (fresh lime powder and anti-stiff powder) in the ant silkworm, silkworm of each instar and mulberry, and use it on time and in quantity;

2. Strengthen targeted treatment according to climate and silkworm room environment, such as adding fresh lime powder when wet, strengthening anti-stiffness treatment when mulberry pests have multiple stiff diseases, using anti-stiffness powder, etc.

3. When the air dust pollution is caused by sand removal in the silkworm room, use 0.5% disinfectant or 1% effective chlorine bleaching powder to disinfect the air and ground;

4. Do a good job in daily disinfection and cleaning of silkworm nets, films, mulberry tools and other small silkworm tools.

III. End disinfection.

At the end of co-cultivation, disinfection should be done well, mainly:

1. Disinfect the silkworm body and silkworm seat once before distributing the young silkworm. The amount of anti-rigor powder should be appropriate and excessive. The silkworm farmer should immediately disinfect the anti-rigor powder again when he receives the young silkworm.

2. When young silkworms are distributed, they should be distributed after sand removal. Do not take silkworm feces out of the co-breeding room. In order to prevent silkworm body damage during silkworm development, thin film silkworm nets should be used to remove sand;

3. In order to prevent outdoor pollution, the flat silkworm net for young silkworms is not taken out of the co-breeding room;

4. After distribution of young silkworms, they should be cleaned and disinfected immediately. Silkworms should be kept properly and not used as big silkworms.