2. Keep the shed dry when entering the shed. Uncover the film to dry the shed during the day, and cover it at night to avoid getting wet in the shed. Before releasing silkworms, lay 1 layer of film on the ground, then lay 1 layer of straw on the film, and put silkworms on the straw. 1-3 years old * * *, 4 or 5 years old can enter the shed the next day.
3. Generally, the temperature in the temperature-regulating greenhouse is higher than that in the indoor silkworm room, and the temperature difference between day and night is large. The key point of greenhouse temperature regulation is to strengthen ventilation on the basis of cooling. High temperature can be alleviated by the following measures:
(1) Covering the canopy with parasols is beneficial to reduce the temperature in the canopy. Commonly used sunshade is sunshade net and grass curtain. The cooling effect of sunshade net covering the roof is better than that of 1. The inner layer clings to the plastic film, and the outer layer is about 15-20 cm from the top of the shed and about 1.5-2 meters from both sides of the shed, forming an outer corridor, which is more conducive to preventing direct sunlight on both sides. According to the investigation, this method can reduce the temperature in the shed by 3-4℃. If the roof is covered with a straw curtain, it should not be too thick to reduce the weight of the ceiling in rainy days. In addition, planting vines around the greenhouse and using green shading can effectively reduce the temperature in the greenhouse.
(2) During the high temperature period, from 9: 00 am to about 3: 00 pm, spray water on the roof every 1 hour/time ... According to the investigation, spraying water on the roof can reduce the indoor temperature 1-2℃.
(3) Strengthen ventilation. After sunrise on a sunny day, uncover the film on both sides of the greenhouse and ventilate. At night, when the temperature in the greenhouse drops below the temperature suitable for feeding, put down the films on both sides to keep warm. When the temperature is high, it is ventilated day and night. In rainy days, put down the sunshade nets on both sides of the greenhouse and lift the films on both sides of the greenhouse to facilitate ventilation.
(4) It is suitable to feed wet leaves in the shed, because the temperature is high and it is easy to cause mulberry leaves to wither after ventilation. Wet leaves can be fed at noon on sunny days, and bleaching powder solution with 0.3% available chlorine concentration can be sprayed in the air to replenish water and prevent diseases.
4. Mulberry cultivation in greenhouse emphasizes ventilation, and raising leaves is easy to cause mulberry leaves to dry up, so it is appropriate to raise mulberry with strips. Silkworms can be raised in strips after feeding mulberry leaves for the second time in the shed. Give mulberries three times a day. According to the characteristics of high temperature and rapid development in greenhouse, mulberry leaves are given in advance. Generally, when the remaining mulberry leaves 10% or so, 1 piece of mulberry leaves should be given. However, the amount and frequency of mulberry feeding should be adjusted reasonably according to the development of silkworm and the weather change.
5, disease prevention and harm prevention according to the conventional method to do a good job of disinfection before sericulture, greenhouse continuous use, before using chemicals, should first cut off about 10 cm topsoil. After disinfection, before sericulture, sprinkle 1 layer of chlordane powder on the ground, and then sprinkle 1 layer of fresh lime powder. Sprinkle more dry materials during the silkworm period. In rainy and sultry weather, fresh lime powder is used 1 time every morning and evening to disinfect silkworm bodies and silkworm seats. If it is raised in a shed at the age of 4, it is necessary to clear the silkworm excrement and clear the silkworm nest in time after the salary is paid at the age of 5.
6. In terms of time, the temperature in the shed is high and the silkworm matures quickly, so it is necessary to make preparations in advance. Feed leaves 1 day before maturity, fill silkworm seats with short stalks, and spray silkworm flies 1 time. When it is about 5% ripe, it begins to release cocoons. Sprinkle 1 layer of fresh lime powder for disinfection before cocoon laying, and then feed 1 leaf. Attention should be paid to avoid over-ripening, otherwise a large number of mature silkworms will suffer losses when they cultivate cocoons in silkworm beds; Also pay attention to shading, so as to avoid excessive light and increase the loss of silkworm cocoons.