The pre-smell disinfection work is an important guarantee and key link for raising silkworms. Every time before silkworm rearing, the silkworm room, the silkworm culm, and the environment used for sericulture must be completely and thoroughly disinfected. The purpose is to kill pathogenic microorganisms, cut off the source of infection, and reduce the amount of microbial pathogens present in the sericulture environment so that silkworms do not become infected. The incidence of disease control from the source of silkworm disease to ensure disease-free and high yield.
1 Scope of disinfection before silkworm
The scope of silkworm pre-sterilization includes adjusting mulberry tools, silkworm worms, mulberry leaves, silkworm larvae and their environments, including feeding rooms, storage mulches, operation rooms, urging greens, receiving ants, upper larvae, and hospital dams.
2 Preparation before disinfection
2.1 Clean the silkworm room, silkworm equipment and surrounding environment Clean the surrounding environment of the silkworm room first, eliminate the garbage, remove the net weeds, clear the Yang Ditch, remove the sewage impurities, and scrape off the top soil around the silkworm sand.
2.2 Do a good job of calculating the silkworm area, volume and calculation of the mulberry leaf, silkworm medicine dosage. The correct calculation of the total area and volume of the silkworm with or without ceiling can be correctly formulated and calculated.
3 silkworm silkworm disinfection order and steps
Silkworms move out → Jamsil cleansing → Burning trash → Jamsil washing and cleaning → Silkworm cleaning and drying → Silkworm soaking and disinfection → Receiving silkworms → Liquid chemical disinfection → Environmental disinfection → Jamsil opening. Specific operations should be "a sweep, two wash, three scrapers, four brushes, five consumer, six drying."
Cleaning: Clean the indoor and outdoor areas, destroy the waste, and reduce pathogens.
Rinse: Rinse the silkworms, silkworms, and the surrounding environment with clean water so that the pathogens are fully exposed.
Scrape: The epidermis is scraped off in the mud-growing area and around the ground, and composted after stacking.
Brush: Use 20% fresh lime slurry to paint inside and outside the walls.
Elimination: disinfection of silkworms and silkworms with 1% bleaching liquid.
Sun: After all the sericulture tools were exposed to the sun, they were put back on the silk shelf for use.
4 physical disinfection
Physical disinfection: First, sunlight disinfection; second, boil disinfection. Sunlight disinfection must be repeated exposure to sunlight, both inside and outside, in order to achieve the effect of auxiliary disinfection. Steam sterilization requires that the water temperature in the stove be above 100°C and the time should be more than 30 minutes. It is best to add 30ml of formalin per cubic meter for better results.
5 Chemical disinfection
5.1 Bleach bleaching powder has comprehensive disinfection effect, strong bactericidal power, and effective chlorine of 25-30%, and has a killing effect on virus diseases, fungal diseases, bacterial diseases, and microscopic pathogens. Stored in: low temperature, dark, dry place.
How to use: Prepare a 1% aqueous solution, 225 ml/m2, and sterilize silkworm and silkworms one week before silkworm rearing. After disinfection, the doors and windows must be closed to maintain a moist state for 30 minutes. The sterilized silkworms do not need to be washed. After drying, they can be used.
5.2 Formalin Formaldehyde has a strong reducing effect and has a strong killing ability against pathogens such as hematogenous pus, air disease, osteoporosis, aspergillosis and microscopic diseases. However, the effect of disinfecting intestinal polyposis in the polyhedra is poor, and 1% fresh lime powder can be added to improve the disinfection effect.
Method of use: formulated as a mixture of 2% or 0.5% lime, 225 ml per square meter. Formalin is generally suitable for closed silkworm rooms, climatological rooms, upper chambers, etc. Rooms that cannot be closed are not suitable. Must be carefully cleaned before disinfection, requiring room temperature to be maintained at 24 degrees for at least 5 hours, doors and windows closed after a day and a night open, until the medicine can be used after the net.
When using formalin disinfection, it must be noted that it should be carried out 10 days before sericulture, because of its strong irritating odor, use gas masks and wet towels to cover the nose and mouth during disinfection to prevent poisoning accidents.
5.3 Mortar sterilisation Just bought back 1% of fresh disinfectant and stir it at any time.
Fresh lime is used for disinfection. The silkworm silkworm has a target concentration of 1%. The ground and surrounding environment use a concentration of 2-3%, and the brush wall concentration is 20%. The dosage is 25-30 kg for each silkworm or 50 silkworm foils, kept moist for more than 30 minutes, and it is better to soak in silkworm foil for 30 minutes. The lime slurry must be turbid.
5.4 Sulphur disinfection According to the volume of medicine used per cubic meter 15g, before sterilization silkworm silkworm to moisturize. In general, 1kg of sulphur is used in each silkworm room, and appropriate amount of cypress is added. Smoke is obscured by closed doors and windows until the gas disappears.
5.5 The concentration of silkworm Huanhuan Huanhuan 1-2%, plus lime 0.5kg/m2.
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