• International Journal of Industrial Entomology and Biomaterials
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• v.10 no.2
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• pp.87-94
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• 2005

Mating is an essential behavioural social event in the life cycle of silkworm, Bombyx mori (L.) for the perpetuation of population. A number of intrinsic and extrinsic factors and events of significant importance are involved in successful mating and egg deposition by an adult silk moth which besides biochemical, physiological and environmental factors also includes attraction of reproductively competent male and female moth for mating, duration and frequency of mating, age of moth at the time of mating, reuse of male moth in the production of eggs etc. An attempt has been made in this review article to elucidate briefly the behaviour of male towards female moth after eclosion, impact of duration and frequency of mating on egg deposition and oviposition, reuse of mated male moth in the production of quality and quantity eggs etc. in the silk-worm, B. mori and its significance in silkworm seed production.

• International Journal of Industrial Entomology and Biomaterials
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• v.30 no.1
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• pp.26-30
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• 2015

Tropical Tasar culture is forest and agro-based activity that covers agricultural and industrial activity. Tasar silk is produced by the silkworm, Antheraea mylitta which is polyphagous in nature. A large number of pests are reported to attack both the host plant as well as silkworm. As the rearing is conducted outdoor silkworms are exposed to attack of various pests during their life cycle. Eocanthecona furcellata (Hemiptera: Pentatomidae) is the major predator of tasar silkworm during young age rearing. Both nymphs and adults of the stink bug suck the heamolymph of silkworm leading to death. The present work was undertaken to study the life cycle of E. furcellata on larvae of vapourer tussock moth which is a major pest of tasar host plants. The incubation period, nymphal duration and total developmental period from egg to adult was $8.0{\pm}0.45d$, $16.0{\pm}3.24$ and $22.0{\pm}4.20d$, respectively. Pre-oviposition, oviposition and longevity of male and female stink bug was $3.20{\pm}0.38$, $17.60{\pm}1.86$, $42.40{\pm}1.94$, $37.00{\pm}3.18d$, respectively. Analysis of the data revealed no significant difference in life cycle of the predator when provided silkworm and vapourer tussock moth larvae as hosts. Which clearly indicates that E. furcellata can multiply on vapourer tussock moth larvae during non rearing periods. Adoption of recommended pest control measures for defoliators of tasar host plants during non-rearing periods will help in reducing the incidence of host plant pests and also in reducing the incidence of stink bug during rearing season. During the study it was also observed that larvae semilooper, boll headed caterpillar and nymphs of leaf hopper serve as alternate/secondary hosts to E. furcellata during non rearing seasons.

• Animal cells and systems
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• v.13 no.3
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• pp.297-304
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• 2009

A complete mRNA sequence of transferrin from the wax moth, Galleria mellonella, was obtained, and compared with those of other species. We previously reported that the sequence was most similar to those of Manduca sexta and Bombyx mori. As in other moths, G. mellonella transferrin had only one iron-binding site at its N-terminal region. Semi-qRT PCR was conducted to investigate tissue-specific distribution and transcriptional regulation of the wax moth transferrin mRNA. Larval muscle and fat body contained larger quantity of mRNA than other tested tissues. In this study, it was observed that iron and cadmium regulated transferrin transcription, and this regulation pattern was tissue specific. Iron up-regulated transferrin mRNA level in fat body, while suppressed it in the Malpighian tubules and silk glands. Cadmium decreased the mRNA level in fat body, muscle, and Malpighian tubules, but significantly increased the mRNA level in silk glands. In addition, the mRNA expression was induced by all tested pathogen-associated molecular patterns (PAMPs) including LPS, lipoteichoic acid (LTA), glucan, and even chitin.

• Proceedings of the Zoological Society Korea Conference
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• 1997.04a
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• pp.55.2-55
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• 1997

No Abstract, See Full Text

• Journal of Sericultural and Entomological Science
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• v.40 no.1
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• pp.33-37
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• 1998

Two types of sperm, apyrene and eupyrene, are identified in A. mylitta. The sperm in the adult moth are motionless in seminal vesicles. At the time of ejaculation they received a secretion from male ejaculatory duct that renders them motile. The dissociation of eupyrene bundles, eupyrene sperm motility and the sequence of events of sperm migration in both sexes are described in the present paper.

• Fashion & Textile Research Journal
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• v.6 no.6
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• pp.785-798
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• 2004

Silk has always been coveted as the finest and richest of all fibers woven into cloth. The earlist woven silk fragments found to date come from the third century B.C. The filament created and spun into cocoon by the larva of the silk moth, silk was exported from China to Europe from as early as the third century B.C. Silk industry is export leading industry that guide national textile industry development after the 1960s in Korea. Korean silk industry reached to peak at 1975 is displaying appearance that export scale is decreased recently. Various kinds methods can be proposed for high value added in silk industry, the research about color is essential. The importance of color is increasing in modern textile and fashion industry. Color is important factor of textile and fashion industry because color affects strong influence in human's sensitivity. Silk fabric can give high added value developing high sensitivity color because dye ability is superior. In this study I planned the "Utility Silk Color Code 288" for efficient color management in silk industry. "Utility Silk Color Code 288" are attached the Munsell notation and dyeing data which can reappear the color when needed. This research constructs for insufficient domestic color infrastruction and expect that basic role to develop the competitive power for Korean silk industry.

• Animal cells and systems
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• v.5 no.3
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• pp.211-216
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• 2001

Polyclonal antiserum against Manduca sexta allatotropin has been utilized to investigate the localization of allatotropin-immunoreactivity in the brain of the si1k moth Bombyx mori. Manduca sexta allatotropin-immunoreactive (Mas-AT-IR) neurons were found in all larval brains investigated, but not in prepupal, pupal and adult brains. In the larval stages, first appearance of Mas-AT-immunoreactivity w8s shown in the brain of first instar larvae, which contains four pairs of bilateral Mas-AT-IR cell bodies. Labeled neurons increased to six pairs in the second instar larval brain, including two pairs of median neurosecretory cells in the pars intercerebralis. In the third and fourth instar larvae, five pairs of labeled cell bodies were distributed throughout each brain. In the fifth instar, there were about ten pairs of bilateral cell bodies in the day-1 brain, about seven pairs in the day-3 brains, and five pairs in the day-5 brains, respectively. Mas-AT-labeling was observed in both axons within nervi corpora cavdiaci (NCC) 1+11 and corpora allata. This suggests that the Mas-AT produced from the brain neurons is transported via some axons of the NCC 1+11 and nervi corpora allati I to the corpora allata, which appears to be a main accumulation site for the Mas-AT neuropeptide in some brain neurons produced in B. mori.

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2003.10a
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• pp.99-99
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• 2003

Brain-derived neurotrophic factor (BDNF) induced a significant neurite extension of antennal lobe (AL) neurons from the silk moth Bombyx mori in culture on lamini/ concanavalin A-coated dishes, in comparison with smaller effect of 20-hydroxyecdy-sone (20-HE). But the effect fur neurite extension by 5-hydroxytryptamine (5-HT) could not be found. A significant increase in the number of new primary branches from the principal neurites of AL neurons was also shown in culture with BDNF and 5-HT, but not with 20-HE. (omitted)

• Proceedings of the Zoological Society Korea Conference
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• 2000.04a
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• pp.77.1-77
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• 2000

No Abstract, See Full Text

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.11a
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• pp.127-127
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• 2001