1. Plastic greenhouse site selection and configuration. Greenhouses should be selected in places with high topography and good ventilation and sunshine conditions. Drainage trenches should be dug around the north and south, and water should be collected after rain. At the ends of the shed, three pillars of 2.3 to 2.4 meters were erected at intervals of 4 meters. The lower end is buried in the earth, and the general shed is 1.7--1.9 meters high, 6- to 7-meters wide, and is self-determined. Cover the film and cover the grass curtain. Cost about 200 yuan, 2. Sericulture technical requirements. (1) Sterilization and disease prevention: Before silkworms enter the shed, they are sealed, and they are individually sterilized with methicillin, formalin, and lime slurry. One week ahead of time, use chlordane powder or ant-proof spirit to prevent ants. For the old shed, it is necessary to change the topsoil first, then ventilate and change the air, and then disinfect it to lay the foundation for the sericulture and high yield in the greenhouse. (2) Temperature and humidity adjustment: Usually enter the greenhouse on the third day of the fourth instar. The greenhouses have good moisturizing performance, but the temperature difference is relatively large. Hang a moisture meter at each end of the shed to facilitate observation. If the temperature is too high, cover the straw or spray the water directly to the roof to reduce the temperature; if the temperature is too low. All or part of the curtain can be removed. In high-temperature and dry weather, it is necessary to cut mulberry strips with dew or feed silkworms to add moisture to the silkworms for moisturizing. It is also possible to add fresh water and enhance ventilation during the day. 8 to 9 o'clock in the morning, lift the sides of the greenhouse and the two skirt membranes to a height of about 60-80 cm, and gradually lower the membrane to maintain the temperature at around 5 pm; if the bitter temperature is too low, two sides of the greenhouse can be draped or properly heated. . (3) Feeding of silkworm: In the inland area, a vertical silkworm seat with a width of 1.6-1.7 meters is laid out, and a sidewalk with a width of about 50 centimeters is left between the silkworm and the silkworm seats for breeding operations. 3. The mulberry is perpendicular to the rake and placed parallel to it. With three leaves or leaves make up the gap. Mulberry twice a day. The silkworm body was disinfected when 5th instar silkworm was feeding, and fresh silk powder was used every day to disinfect silkworm body and silkworm seat until the 5th instar 4th day. On the 1st, 3rd, 5th, and 7th days after 5th instar, chloramphenicol was added to prevent bacterial disease, and on 2nd, 4th, and 6th day, silkworm flies were sprayed to prevent fly lice. Add chloramphenicol and eliminate silkworm flies to prevent dead cages and wormholes in the pre-sheath. (4) Shangyu: In the silkworm after seeing cooked, sprinkle a fresh lime powder, change the feed leaves or shoots, see cooked about 5%, the ripening, the next day at noon to focus on the cluster. The square cheek pieces were hung vertically one after another, about 10 centimeters apart, connected with the pipa surface, and the silkworms were concentrated on the pupa with pupa. Pick up the mountain larvae and concentrate on the larvae again.
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