• Proceedings of the Korean Society of Sericultural Science Conference
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• 2005.11a
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• pp.28-28
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• 2005

• Journal of Sericultural and Entomological Science
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• v.37 no.1
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• pp.57-61
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• 1995

In order to isolate naturally occuring novel B. thuringensis strains, we identified the distribution of B. thuringiensis from soils of sericultural farms(spring and autumn season, respectively) of various regions in Korea. A total of 82 strains of B. thuringiensis producing spore and crystal were isolated. We examined oral toxicity against lepidopterous larvae, Bombyx mori, dipterous larvae, Culex pipiens and coleopterous, Sitophilus oryzae. The results showed that 82 B. thuringiensis isolates from sericultural farms were isolated and most isolates were toxic to lepidopterous larvae. Particularly, B. thuringiensis strains which is lepidopterous-active, lepidopterous-and dipterous-active were widely distributed. Also, non-toxic B. thuringiensis isolate was common.

• Journal of Sericultural and Entomological Science
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• v.18 no.1
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• pp.17-19
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• 1976

These surveys were carried out to investigate of damage of agricultural chemicals, tabacco, and factory smoke on silkworm rearing Autumn in 1975 1. Damaging rate in chemicals, tabacco and factory smoke was 1.4, 0.6 and 0.1 percent each other. 2. In damage by agricultural chemicals, it appeared to be chemicals for rice (49.4%) orchard (21.2%) and vegetable (12.3%) in order. 3. Status of damaging rate in tabacco showed 60 and 18 percent in tabacco field and tobacco drying place near mulberry field. and showed 14 and 8 percent in rabacco drying place and tabacco field near rearing house. 4. The damage of factory smoke is largely stone powder of cement.

• Journal of Sericultural and Entomological Science
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• v.44 no.1
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• pp.19-21
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• 2002

Suwonppong, which is the leading mulberry variety, has the fertility and the characteristics of fruit that are listed bellow. The percent of making seed is 61.8%, the percent of sank seed is 54.7% and the percent of germination is 95%. the percent of cross success is 31.8%. The single fruit weight of mulberry fruit is 3.58 g and its size is medium and big, the color of it is black. The sugar content of mulberry fruit is 15.7%(Brix), the total acidity is 0.18%, and the pH is 6.3. The maturing period of mulberry fruit is medium maturity and the degree of fruit setting is the same as Cheongilppong.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.23-23
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• 2011

신라는 유잠국을 거쳐 새로운 비단이라는 신라(新羅)로 국호를 변경한다. 신라 뽕나무와 비단의 행방을 �O는다면 실크로드의 출발점이 한반도의 신라의 땅이라는 추정에 의거하여 1995년부터 조사를 하였다. 특히 삼국사기의 내용을 기초로 하여 한반도의 지명을 방문하여 조사하는 과정에서 삼국사기의 내용이 전혀 한반도에는 정확하게 일치하지 않는다는 사실을 확인하였다. 1. 신라는 한반도에 없었다. 최근 한학자이신 이중재님이 발표한 논문과 책자를 기초로 조사 검정을 하는 중에 고구려, 신라 백제가 한반도에 없었다는 사실을 확인 하였다. 2. 중국고금지명대사전(1931)을 중국 청도에서 섬유공장장으로 근무하는 정윤화친구의 도움으로 구입하여 이중재의 책의 내용을 검정하였다. 그러므로 신라의 비단과 양잠을 한반도에서 확인하는 것은 잘못된 사실이라는 것을 확인하였다. 3. 삼국사기의 내용을 중국고금지명사전을 이용하여 확인한 결과 그동안 의문으로 되어 있는 임라설, 가야설, 고구려 신라 백제의 강역, 문익점 선생의 최초의 목화에 대한 사실 등 모든 사실을 잘못된 내용이라는 것을 확인 검정하였고, 현재의 한반도의 역사는 식민주의 역사학자들이 한반도의 역사를 왜곡한 사실을 확인하였다. 4. 한반도에서는 고려시대 이전에는 나라 형태의 국가는 없었고, 조선시대부터 국가의 형태가 성립되었다.

• Korean journal of applied entomology
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• v.61 no.1
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• pp.221-227
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• 2022

In accordance with Article 6 of the 「Insect Industry Promotion and Support Act」, the National Institute of Agricultural Sciences conducted a fact-finding investigation in the insect industry for related workers in 2020. Most commonly, insect industry workers were involved in production (98.5%), the male ratio was high (80.4%), while those in their 50s comprised 36.4% of the workers. As for the uses of industrial insects, 66.5% was for food and medicine, 12.7% for feed, and 20.7% as pets. The most commonly produced industrial insect species by use were the white-spotted flower chafer (69.6%), Protaetia brevitarsis seulensis (Kolbe), for food and medicine; crickets (31.2%) for feed; and the rhinoceros beetle (45.6%), Allomyrina dichotoma (Linnaeus), as pets. Powder was the most common product form at 68.5%, and live insects constituted 40.9%. Insect farms with an annual income accounted for 77.3%, of which 65.4% had annual sales of less than 20 million won. Market acquisition was rated by most insect industry workers (84.0%) as the primary challenge. In conclusion, although the number of people employed in the insect industry is increasing annually, the number of young insect farmers (20s to 40s) is decreasing. The production of industrial insects was limited to a few species, and more than half of insect farms have very low incomes. Furthermore, insect farms have the greatest difficulty in market acquisition, necessitating the development of utilization technology to promote the consumption of industrial insects.

• Korean journal of applied entomology
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• v.43 no.2
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• pp.143-153
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• 2004

Non-spinning syndrome of Bombyx mori has been serious issue in sericulture industry near Kyungbuk area. This study was focused on the analysis of the mechanism and on screening candidate chemicals inducing the anti-metamorphosis of the silkworms. Rearing temperatures or initial body weight of the final instar larvae did not affect a normal larval to pupal metamorphosis of B. mori. However, pyriproxyfen (a juvenile hormone (JH) agonist) induced follicle patency significantly even at its 10$\^$-8/ M concentration and inhibited metamorphosis of B. mori in both developmental time and dose dependent manners. Pyriproxyfen induced JH esterase (JHE) activity and downregulated expression of JH binding protein of 5. mori. These results suggests that pyriproxyfen induced JHE activity as a JH agonist and that the elevated JHE activity degraded endogenous JH and resulted in JHBP gene expression. Based on the fact that the JH agonist induced follicle patency and inhibited metamorphosis of B. mori, follicle patency bioassay suggested that three commercial pesticides including simazine, molinate or alachlor were proved to give potent JH agonistic effect on B. mori. Further direct exposure experiments to these candidates are required to determine the chemicals responsible for the non-spinning syndrome of 8. mori.

• Journal of Sericultural and Entomological Science
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• v.53 no.1
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• pp.38-43
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• 2015

To increase the income of sericultural farms and expand sericulture industry, new high value-added products of sericulture which are beyond current products like 5th instar 3 day dried silkworm, male pupa and silkworm dongchunghacho are needed. For this sericulture product diversification, it is in desperate need of the edible processing method after 5th instar 4 day silkworm that silkgland formation is rapidly in progress during the larva periods. So far it was hard to eat because of silkgland formation in their body. So we try to boil and steam frozen-, dried-, and living-silkworm to develop low-cost edible processing methods for farmers. As the result, the silkgland of frozen and dried silkworm was not degenerated, so silkgland in their body was not edible. But in the case of living silkworm, the silkgland of mature silkworm was degenerated by boil and steam treatment, so the body and silkgland of silkworm were not only edible but also tasted good. Then the dried silkworm was easily powdered and there was no problem when it was eaten. This source technology can be widely used in the general food industry, health functional food cosmetics, pet food and so on, so it is predictable that this will contribute to increase the income of sericulture farms and expand sericultural industry.

• Journal of Sericultural and Entomological Science
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• no.11
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• pp.87-94
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• 1970

This study was conducted in order to find out the tendency of sericultural woman's clothes. This data was based on random samples of 183 sericultural women throughout the country, and was derived from the investigation of c1othes (western and Korean-style) which had been made during the years, 1967∼1969. The results obtained are summarized as follows: 1. Western-style clothes were about twice as popular as Korean-style, and more evident among the young women. It was also shown that the ratioes mentioned above were gradually decreased year by year. 2. Most popular among the western-style clothes were blouses, one-piece dresses and skirts. Jogori(coat) and Cheema(long skirt) were favorites among the Korean-styled clothes. One-piece dresses showed increasing tendency of use year by year. 3. Costume-made clothes were much more in number than the home-made and the ready-made types. The home-made and the ready-made clothes increased as the ages increased. 4. Western-styled clothes were popular in summer seasons while Korean-styled clothes were popular in the winter time. Among the western-styled clothes one-pieces dresses and two-piece suits were most popular during the spring through autumn. In Korean clothes the Cheema was popular all year round. 5. Western-style clothes were mostly made of polyester and their blends. Silk was the least used fabric. On the contrary, most of Korean-style clothes were made of silk and their blends. The synthetic fibers showed increasing use year by year. 6. Favorite colors were in order; white, blue, brown, and black in western-style clothes; white, blue, green, and gray were in Korean style clothes. Young women teaded to have a wider preference of colors than the older women.

• Food Science and Industry
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• v.55 no.2
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• pp.154-165
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• 2022

Humans have been breeding the mulberry silkworm for the long period of time to obtain silk fabric and nutrient-rich pupae. Currently, silkworm larvae, pupae, and silk-Fibroin hydrolysates are registered as food raw materials, while silkworm feces and Bombyx batryticatus are registered as Korean traditional medicines. Among sericulture products, individually recognized health functional food ingredients include silk-protein acid-hydrolysates for immunity enhancement, Fibroin-hydrolysates for memory improvement, and freeze-dried 5^th instar and 3^rd-day-silkworm powder for lowering-blood sugar. Recently, HongJam produced by steaming and freeze-drying mature silkworms were reported to have various health-promoting effects such as preventing the onset of Alzheimer's disease and Parkinson's disease, enhancing gastro-intestinal functions, improving skin-whitening and hair growth, and extending healthspan. By consuming silkworm products with various health-promoting effects, it is possible to increase the healthspan of human beings, thereby reducing personal and national medical expenses, resulting in increasing the individual's happiness.