scholarly journals Environmental factors and rearing techniques affecting the rearing of silkworm and cocoon production of Bombyx mori Linn

2021 ◽  
Vol 2 (2) ◽  
pp. 62-67
Author(s):  
Sanjai Kumar Gupta ◽  
Rajesh Kumar Dubey
Keyword(s):  
Environmental Factors ◽  
Bombyx Mori ◽  
Cocoon Production ◽  
Rearing Techniques

scholarly journals Controlling of bacterial and fungal diseases that contaminating mulberry silkworm, Bombyx mori by using some plant extracts

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Mahmoud S. I. Saad ◽  
Enas M. Y. Elyamani ◽  
Walaa M. M. Helaly
Keyword(s):  
Bombyx Mori ◽  
Larval Mortality ◽  
Pupal Weight ◽  
Filament Length ◽  
Larval Weight ◽  
Shell Weight ◽  
Cocoon Production ◽  
Black Seed ◽  
Mulberry Silkworm ◽  
Silk Filament

Abstract Background Mulberry silkworm, Bombyx mori L. is one of the most economically important insect because its production of silk which interfere with many important industries. Diseases of the silkworm, B. mori such as viral, bacterial, fungal and protozoan pathogens seriously affect their cocoon production. Bacterial and fungal pathogens independently cause the highest cocoon loss, so the use of botanicals is considered an important strategy to control diseases of silkworm. Results The artificially infected silkworm, B. mori larvae with Bacillus thuriengiensis when treated with concentrations of 2 and 3% of black seed and basil leaves extracts increased significantly larval weight and decreased larval mortality. In addition, 3% basil leaves extract and 1% of black seed increased pupal weight. Cocoon weight and cocoon shell weight increased significantly by 3% basil leaves extract treatment. All tested concentrations of black seed extract increased the silk ratios of the resulted cocoons as compared to the infected control. For technological parameters, all tested extracts at 3% concentration caused the highest silk filament length; meanwhile control larvae recorded the highest silk filament weight and size. Regarding the mulberry silkworm, B. mori artificially infested with conidial solution of Beauveria bassiana when treated with all concentrations of the tested plants showed an enhancement in larval weight, pupal weight, cocoon weight, cocoon shell weight, silk filament length, and filament weight and reduced the larval mortality percentage. The highest silk filament size were recorded for the control group. Conclusions Tested concentrations of Morus alba, Ocimum basilicum leaves extracts and Nigella sativa seeds extract have suppressed the bacterial and fungal disease spread when used three times through both 4th and 5th larval instars. Moreover, the biological characters and technological traits enhanced by using of these extracts, so it can be used in sericulture for improving cocoon crop quality and quantity.

scholarly journals Influence of external environmental factors on the productivity of mulberry silkworm (Bombyx mori L) in different sizes of silk breeding organizations

2021 ◽  
Vol 258 ◽  
pp. 04047
Author(s):  
K Jumagulov ◽  
N Rajabov ◽  
KH Rakhmanova ◽  
O. Karimov ◽  
Z Sharapova ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Environmental Factors ◽  
Bombyx Mori ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Technical Measures ◽  
Silkworm Bombyx Mori

The information presented in this article suggests that the larger the silkworm breeding organization (SBO), the harder it is to maintain a comfortable temperature, relative humidity, and other environmental factors, resulting in the development of silkworm cocoons. differently, the process of implementing agro-technical measures is disrupted. As a result, industrial cocoons are reported to have a yield of 14-17%, viability 22-25%, worm life 7-9 days and silkworm cocoons 7-13%.

scholarly journals Metabolic Characterisation of the Midgut of Bombyx mori Varieties after BmNPV Infection Using GC-MS-Based Metabolite Profiling

2020 ◽  
Vol 21 (13) ◽  
pp. 4707
Author(s):  
Heying Qian ◽  
Gang Li ◽  
Guodong Zhao ◽  
Mingzhu Liu ◽  
Anying Xu
Keyword(s):  
Oxidative Phosphorylation ◽  
Small Molecules ◽  
Bombyx Mori ◽  
Metabolic Pathways ◽  
Resistance Mechanism ◽  
Tryptophan Metabolism ◽  
Cocoon Production ◽  
Beta Alanine ◽  
Aryl Hydrocarbon ◽  
Phenylalanine Metabolism

Bombyx mori nucleopolyhedrovirus (BmNPV) is a silkworm disease that is especially harmful to cocoon production and seriously restricts sericultural development. Our laboratory successfully cultivated a new highly BmNPV-resistant silkworm variety, Huakang 2; however, its mechanism of BmNPV resistance remains unclear. To understand its resistance mechanism, we conducted a metabolomic and transcriptomic study of the midgut of silkworm varieties, Baiyu N and Baiyu after BmNPV infection. We identified 451 differential metabolites, which were mostly comprised of small molecules, such as saccharides, acids, amines, alcohols, and glycosides. We found that the primary differences in disease resistance between the silkworm varieties are metabolic-pathways, tryptophan metabolism, oxidative phosphorylation, ABC-transporters, beta-alanine metabolism, and phenylalanine metabolism. Combined analysis with transcriptomic data suggested that tryptophan metabolism and oxidative phosphorylation are closely related to the silkworms’ BmNPV resistance. We hypothesize that the roles of the two metabolic pathways in the BmNPV resistance mechanism might be the following: Oxidative phosphorylation generates a large amount of adenosine triphosphate (ATP) in response to BmNPV infection to provide silkworms the energy required for establishing BmNPV resistance. Tryptophan metabolism then activates the aryl hydrocarbon receptor (AhR) through the exogenous virus BmNPV, which activates the silkworm’s immune system to defeat BmNPV infections.

scholarly journals Utilization Of Uv Radiation For The Improvement Of Economic Traits In The Silkworm, Bombyx Mori L.

1970 ◽  
Vol 6 ◽  
pp. 33-37 ◽  
Author(s):  
Md Jamsed Ali ◽  
Sawdagar Mahfazur Rahman ◽  
Saiful Islam Faruki ◽  
Md Kamrul Ahsan
Keyword(s):  
Bombyx Mori ◽  
Uv Radiation ◽  
Larval Mortality ◽  
Economic Traits ◽  
Selected Lines ◽  
Cocoon Production ◽  
Commercial Exploitation ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori ◽  
Shape And Size

To detect the effect of ultraviolet (UV) radiation on some economic traits of the silkworm, Bombyx mori L. variety Urboshi-1, 5-day old pupae were irradiated with 366nm wavelength of UV-rays at a distance of 10.6 cm for 1, 5 and 10 min. UVradiation had significant effects on majority of the 16 characters considered for the study. Three different lines viz. U1-DW, U1- LW and U10-LD were isolated on the basis of their cocoon shape and size from the rearing of the 1st radiated generation (R1). The rearing of the R2 generation produced cocoons which conformed to the shape and size of the cocoons as selected in the R1 generation. The selected lines showed better rearing performance than the control for majority of the characters, especially the cocoon characters which had direct relationships with the commercial cocoon production. Cocoons produced in the R2 generation were utilized in the R3 generation. The evaluation of the cocoon characters of the R3 generation revealed that U1-LW and U10- LD lines hold promise for commercial exploitation. Moreover, U10-LD also showed the lowest larval mortality. DOI: http://dx.doi.org/10.3329/jles.v6i0.9718 JLES 2011 6: 33-37

Reductionist thinking and animal models in neuropsychiatric research

2019 ◽  
Vol 42 ◽  
Author(s):  
Nicole M. Baran
Keyword(s):  
Animal Models ◽  
Mental Disorders ◽  
Environmental Factors ◽  
Neuropsychiatric Disorders ◽  
Model Organisms ◽  
Developmental Genetic ◽  
Term Study ◽  
Genetic And Environmental Factors ◽  
Mechanisms Of Plasticity

AbstractReductionist thinking in neuroscience is manifest in the widespread use of animal models of neuropsychiatric disorders. Broader investigations of diverse behaviors in non-model organisms and longer-term study of the mechanisms of plasticity will yield fundamental insights into the neurobiological, developmental, genetic, and environmental factors contributing to the “massively multifactorial system networks” which go awry in mental disorders.

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