In the early autumn of 214, a new variety of tussah silkworm was developed by the Liaoning Provincial Sericulture Research Institute. This innovative strain incorporated advanced techniques such as reverse selection technology, seasonal conservation breeding, and the use of hybrid vigor. After 13 years of dedicated research and development, this silkworm variety demonstrated remarkable characteristics: high productivity, superior quality, strong disease resistance, cold tolerance, and the ability to thrive on roughage. The cocoons produced by this silkworm have excellent heat dissipation properties, making it a promising choice for the tussah silkworm industry.
The introduction and application of this variety not only contribute to the protection of silkworm resources and the prevention of soil erosion but also help improve the production layout and capacity of tussah silkworms. Moreover, it has successfully expanded the geographic range of tussah production in China to five northern latitudes, with an expected increase in production scale by 2 to 3 times. This achievement earned the variety the Second Prize for Scientific and Technological Progress in Liaoning Province.
Early 214 silkworm larvae exhibit a pale yellow color, with a ginger-yellow back and banana-yellow sides. The cocoon is gray-brown, and most do not emerge as moths after scabbing in early autumn. Female moths are cinnamon brown, while males display a light brown leaf-like color. The moth emergence rate and egg-laying capacity are high, with each female laying approximately 290 eggs and a hatching rate of up to 97%. The spring rearing cycle lasts 50–53 days, while the autumn cycle takes 43–50 days. This variety is highly resistant to poor feeding conditions, remains active, and is easy to raise—provided that they are not fed on light loquat leaves, which could cause the "running slope litchi" phenomenon. It also shows strong resistance to silkworm diseases.
Testing of the silk yarn from this variety showed impressive results: a silk length of 986.45 meters, a solution silk length of 661.32 meters, an unwinding rate of 67.04%, a recovery rate of 61.09%, a wire drawing rate of 6.78%, a dry weight of 58.08 grams, and a fiber weight of 100.86 grams. The silk is of high quality, soft, and shiny.
In terms of production performance, Early 214 exhibits stable yields with a conversion rate as high as 99.57%. From 2001 to 2003, 26,890 silkworms were raised across 5 provinces, 16 cities, and 38 townships in northern China. The average yield per silkworm reached 772.4 kilograms, representing a 36.2% increase in silkworm yield and a 15.5% rise in silk production. In Mudanjiang City, Heilongjiang Province, 94 crops were raised, with an average pupa yield of 862.0 kilograms per autumn silkworm, a 23.3% improvement over control varieties. Field surveys indicated that each cocoon generated an income of about 2,490.14 yuan, showing significant economic benefits.
For rearing and traditional technical practices, the silkworms grow neatly and rapidly, requiring early removal of the pods. Timely pruning and tree changes ensure that the silkworms have enough food, promoting their robustness. During the 3rd to 9th day of the 5th instar, leaves should be concentrated and appropriately thinned. For two fields and nesting areas, tree species and age should be scientifically selected based on the actual conditions of the silkworm field to protect the ecological environment and improve resource utilization.
When preparing a single cross in early autumn, the silkworm body of 883932 is larger, slightly longer, and has a greenish-brown color. The accumulated temperature during the flood season is about 15°C higher, so it's important to receive the ants early and dry out of the reservoir to ensure proper preparation for the fourth stage. The adults of the hybrids meet at the right time, and careful selection and timely raising of silkworms help improve the quality of the pods.
During winter and spring preservation, special attention must be given to preventing artificial mixing, ensuring smooth and thorough seed production for the next year’s early autumn season and laying a solid foundation for high yields.
Over the years, scientific experiments and practical applications in suitable areas have shown that Early 214 and its parents possess strong resistance and adaptability, making them well-suited for tussah silkworm production in China, especially in the three northeastern provinces. Cities and counties such as Jiamusi, Mudanjiang, Ning’an, Linkou, Hailin, and Jixi have successfully raised this variety, achieving remarkable economic returns.
Sterilization Container
The purpose of the sterilization box is to store the equipment in the process of packaging, sterilization, transfer, storage and so on. These orthopeadic instruments working mode is suitable for high pressure steam sterilization, not suitable for dry heat sterilization, ethylene oxide sterilization, ultraviolet sterilization, microwave sterilization and formaldehyde sterilization. The sterilization instrument box is divided into two parts,the cover and the body. The central area of the box cover is the filter system of the disinfection box, which is composed of quick filter system clasps and filter paper. The clasps need to be fixed by double keys, and the fixed sound can be heard during operation, which can effectively avoid the accidental loss of filter paper. Filter paper can be reused for 1 000 times, has chemical resistance, its chemical properties will not change with time, and its hardness exceeds steel. There is also a safety fit for the filtration system around the box cover, namely a silicone washer and a tension retaining ring. On both sides of the box there are handles, locks and sockets for indicating signs.
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