Spring silkworm breeding should pay attention to matters and issues

As the saying goes: The season of the year is spring, and the amount of calving produced in the spring accounts for about 40% of the whole year. Therefore, striving to win the harvest of spring silkworm is the key to the whole year. Then how to raise the silkworm should start from the following points:
First, do a good job of disinfection before silkworm rearing
1, disinfection period: about a week before the sericulture.
2, disinfection method:
1 Cleaning and Cleaning: Clean the Jamsil and surrounding environment before disinfection. Rinse the cement surface with water. The mud land should be scraped with a layer of topsoil, replaced with new soil, and the walls should be painted with lime water to remove weeds and clear the trash. Gutters, sewage, silkworms washed with water and dried.
2 Pharmacy Disinfection: The current disinfectants use more chlorine preparations, such as methicillin, bleaching powder, and disinfection net.
Cleaned silkworms were placed in the silkworms and then sterilized. If necessary, the silkworms can be soaked in a pre-prepared 5% lime water tank and soaked for about 30 minutes. Medicinal silkworm indoor spray disinfection. Be sure to spray evenly, be completely moist, and moisturize for more than 30 minutes, avoid direct sunlight, preferably in wet weather or sunny mornings and evenings.
3. Precautions The sterilized silkworm can not be moved to the unsanitized place and allowed to dry naturally.
Second, do a good job of urging youth to make up for what the green done, it is related to the hatching of silkworm eggs. The specific approach is: heating the silkworm room one day before breeding, keeping the temperature at 21°C in the evening, and the difference between wet and dry 2°C. After the silkworms enter the silkworm room, the temperature rises gradually from 21°C and rises by 0.5°C—1.0°C per hour, reaching 25.5°C per hour. The difference between dry and wet is about 1.5°C. The silkworm eggs are spread flat, covered with shades, the humidity is kept stable, and attention is paid to ventilation. Heating braziers should be one meter away from the silkworm species.
Third, keep a good small silkworm
1. Small silkworms adapt to the high temperature and humidity environment. Now it is generally used to prevent dry paper breeding, namely, the first and second ages cover the lower mat, and the third age upper cover is the dry paper. The temperature is generally between 25.5°C and 28°C. The difference between dry and wet 0.5 °C.
2. The growth and development of small silkworms are fast, and the quality requirements for mulberry leaves are high. The small silkworm leaves are to be used for ripe leaves, and the mulberry leaves are required to be smooth and soft. From the leaf color point of view, one-year-old green with yellow, second-instar green, third-in-dark green; at the same time pay attention, reasonable storage mulberry, keep mulberry leaves fresh.
3, small silkworms sleep fast, sleep time is short, silkworm body is small, inconvenient to operate, and the moving distance of the silkworm children is small, food mulberry time is short, also has the characteristics of phototaxis, strong density, etc., therefore, small silkworm plus sleep network To be early, give the mulberry to be fine, strive for uniformity, expand the seat in a timely manner, and keep the indoor light evenly. The removal of sand from small silkworms is generally not affected by the first instar, except for the second instar (two times of insomnia and one inoculation), and the third instar in addition to three times (in times of sleep, beginning, and middle).
Fourth, large silkworm rearing
1. Large silkworm adapted to low temperature and dry environment. Generally, the suitable temperature for four instars is 24°C-25°C, the wet and dry difference is 2.5°C-3°C, the fifth instar is 23°C-24°C, and the wet and dry difference is 3°C-3.5°C. Try to avoid temperatures below 20°C and 30°C or higher. The high temperature.
2. The large amount of mulberry eats in the large mulberry leaves. It is necessary to do a good job in mining, transporting and storing mulberry leaves. Use leaves every day to correctly estimate and prevent excessive or insufficient mulberry leaves. Collect leaf as far as possible to use the first three leaves, branches or branches of the lower part of the foot, to achieve a planned cutting cutting. Transport mulberry leaves should be loosely packed and shipped to prevent wilting and fever.
3, good mulberry satiety, especially in the fifth day after the fifth instar, after the mulberry to do a full mulberry and make up the mulberry work, and with the growth of silkworm eggs to expand the seat, prevent excessive density.
4, strengthen the prevention of disease during the silkworm period. Large silkworms should remove sand regularly and properly deal with the silkworms. It is found that the diseased silkworm is isolated and eliminated in time. The dead silkworm should be placed in a lime-disinfecting tank and burned or buried deeply. Sprinkle lime and anti-pointing powder every morning and evening in the rain. Sunny days only sprinkle lime or anti-static powder every day. However, it should be noted that in the rainy days, there is no need to prevent disease, so as to avoid causing minor poisoning in silkworms and reduce the resistance of silkworms, silkworms are susceptible to disease.
5. Do a good job of sleeping and raise them in batches. When we find that there are sleeping silkworms, we add a sleeping net to remove sand, and then we feed the leaves only after two leaves. Silkworms basically sleep. If there are still some silkworms that can't sleep, we should add a net and keep the untreated silkworms separately. Silkworms feeding should wait until the silkworms are all open and feed the leaves again.
6, to prevent pesticide poisoning, this is the quarterly silkworm should pay attention to things. Silkworm leaves must be tested before the leaves are used, and silkworms can be fed under certain non-toxic conditions.

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