Bibliographies thématiques / Tropical tasar

Littérature scientifique sur le sujet « Tropical tasar »

Auteur : Grafiati
Publié le 18 mai 2024

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Articles de revues sur le sujet "Tropical tasar"

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Madhusudhan, K. N., Mr Shivakumar, S. Sakshi, V. P. Gupta, A. H. Naqvi, K. P. Kirankumar et Mr Babulal. « Evaluation of chitosan and chitosan silver nanocomposites against bacterial pathogens of tropical tasar silkworm, Antheraea mylitta Drurry ». Journal of Environmental Biology 44, no 3(SI) (3 juin 2023) : 498–504. http://dx.doi.org/10.22438/jeb/44/3(si)/jeb-09.

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Aim: The present research work was carried out to evaluate the effect of commercially available shrimp chitosan and chitosan silver nanocomposites (CSN) on the inhibition of bacterial pathogens of tropical tasar silkworm. Methodology: Synthesis of chitosan silver nanocomposite was by carried by using chemical precipitation method. The synthesized nanocomposites were characterized using different techniques. Further, antimicrobial potential of the chitosan and chitosan silver nanocomposites was evaluated by in vitro inhibition assay. The minimum inhibitory concentration of both chitosan and chitosan nanocomposites was estimated against bacterial pathogens of tasar silkworm. Results: Chitosan at different concentrations showed antibacterial activity against the bacterial pathogens (Bacillus spp., Micrococcus spp., and Serratia spp.) of tropical tasar silkworm under in vitro conditions. The 0.2% concentration of chitosan and CSN was identified as a minimum inhibitory concentration (MIC) against bacterial pathogens. Interpretation: Based on the findings of this study, the 0.2% concentration of CSNs may be considered as minimum inhibitory concentration against bacterial pathogens infecting tropical tasar silkworms. Key words: Bacterial pathogens, Chitosan silver nanocomposites, Tropical tasar silkworm
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Das, Suman, Ashmita Ghosh, Mrinal Ray, Gangesh B. Singh et Pradip Kumar Baruah. « Eco-friendly Environment of Tripura, India Prove to be a Boon for Tasar Cultivation on Zizyphus mauritiana L. » INTERNATIONAL JOURNAL OF PLANT AND ENVIRONMENT 5, no 01 (1 janvier 2019) : 63–66. http://dx.doi.org/10.18811/ijpen.v5i01.11.

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Indian silk industry is the second largest producer of silk in the world. India has the unique distinction of being the only country producing all the five known commercial silk, namely, Mulberry, Tropical Tasar, Oak Tasar, Eri, and Muga. Among the four varieties of silk produced in 2015-16, Tasar accounts for 9.90%, i.e., 2,818 MT of the total raw silk production of 28,472 MT. In Tripura, the societies are well acquainted with only mulberry silk production. Temperature plays a very vital role in the growth of Tasar (Anthereae mylitta) silkworm also. Anthereae mylitta is a species of moth in the family Saturniidae known commonly as the Tasar silkworm and Vanya silkworm. This species is variable, with at least 44 identified eco-races, populations adapted to varied ecological conditions and food plants. Though Tripura is endowed with well demarcated sub-tropical and temperate zones with a low average temperature of 10°C in the winter season which rises to a maximum average of 35°C in the summer, it supports the cultivation of tropical Tasar silkworm in a very unique manner naturally. The present study analyzes the morphological behavior of the Tasar silkworm in a new environment and its interaction to that particular eco-friendly environment to facilitate the socioeconomic upliftment regarding the sericulture practices exhibited by the rural people of the state of Tripura. This study also proves that in the near future Tasar culture will become a boon to the poor people along with Mulberry cultivation.
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Mahendran, Botlagunta, Chitrangada Acharya, Rupesh Dash, Sudip K. Ghosh et S. C. Kundu. « Repetitive DNA in tropical tasar silkworm Antheraea mylitta ». Gene 370 (mars 2006) : 51–57. http://dx.doi.org/10.1016/j.gene.2005.11.010.

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Ranjan, Amit, Anjana Poddar et S. P. Roy. « Environmental Controlling Factors of Tasar Silkworms Antheria mylitta Drury (Lepidoptera : Saturniidae) ». Our Nature 10, no 1 (13 mars 2013) : 115–18. http://dx.doi.org/10.3126/on.v10i1.7771.

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The paper deals with the ovipositioin, hatchability, fecundity larval and pupal performances of a tropical variety of tasar silkworms Antheria mylitta Drury (Lepidoptera : Saturniidae). The Tasar silkworms have been cultured feeding on the leaves of Arjun (Terminalia arjuna) in the laboratory at temperature 30°C and humidity 86% which has been recorded congenial for the hatching of the larvae. It was estimated that a potent female laid 285 eggs which are all variable and hatched into first instar larvae i.e. of 7 days each. Such a high reproductive potential of tasar silkworms will be beneficial for tasar production which has high value in the trade and commerce.DOI: http://dx.doi.org/10.3126/on.v10i1.7771
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Vanitha, K., et S. Santhosh. « A first report of egg parasitism in the Tropical Tasar Silkworm Antheraea mylitta (Drury) occurring on cashew ». Journal of Threatened Taxa 8, no 7 (26 juillet 2016) : 9045. http://dx.doi.org/10.11609/jott.2456.8.7.9045-9047.

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The present study has documented egg parasitism in Tropical Tasar Silkworm for the first time. The parasitoid is Anastatus leithi (Walker) belonging to Eupelmidae family. It is a solitary koinobiont endoparasitoid, emerges out as adults from the tasar eggs in 17-20 days during August- September. The parasitism rate was recorded at 11.90 percentage.
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Vanitha, K., U. C. Javali et P. S. Bhat. « Rearing performance of tropical Tasar silkworm (Antheraea mylitta Drury) on Cashew (Anacardium occidentale L.) and its commercial silk properties ». Journal of Applied and Natural Science 9, no 1 (1 mars 2017) : 150–55. http://dx.doi.org/10.31018/jans.v9i1.1163.

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Tasar silkworm, Antheraeamylitta Drury (Lepidoptera: Saturniidae) is one of the commercially exploited non-mulberry silkworms mainly reared outdoor on many wild plants. The ecorace of tasar silkworm occurring in cashew (Anacardiumoccidentale L.) plantations of Puttur was identified as A. mylitta KE-02. Pooled egg, larval and pupal period of tasar silkworm upon indoor rearing on cashew recorded were 6.43, 28.69 and 25.36 days, respec-tively, with the effective rate of rearing of 40 %. The average cocoon weight, pupal weight and shell weight recorded were 6.24 g, 5.30 and 1.18 g, respectively. The high shell ratio of 22.26 %, shows a healthy trend for high yielding tasar rearing on cashew. The commercial silk properties of cashew reared cocoons were assessed in comparison to silk properties of cocoons reared on Terminalia paniculata. Average filament length, average non-breakable filament length, denier, strength and elongation were found 547.2 m, 1231.6 m, 8.92 D, 1.57 gpd and 16.9 %, respectively on cashew and 518.2 m, 161.94 m, 9.13 D, 1.73 gpd and 18.7 % , respectively on T. paniculata. The present study has documented the biology of tasar silk worm on cashew and also the commercial silk properties of cocoon reared on cashew at preliminary level.
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Ray, Priti Pragyan, et Barsha Barala. « Geospatial mapping of ecoraces of tasar silkworm (Antheraea mylitta Drury) using remote sensing and geographic information system techniques ». Environment Conservation Journal 24, no 3 (9 avril 2023) : 98–104. http://dx.doi.org/10.36953/ecj.15052468.

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Tropical Tasar silkworm Antheraea mylitta Drury (Family: Saturniidae) produces Tasar silk which has very high demand globally and because of their wide range of distribution in tropical regions, they have adapted to different niches forming different ecoraces. In Odisha, alone seven types of ecoraces of A. mylitta have been reported, namely Modal, Sukinda, Nalia, Jata-Daba, Adaba, Umerkote, and Boudh. These ecoraces show differences in their phenotypes, genetic constitution, fecundity, voltinism, etc. In the past few decades, there is the substantial deterioration of habitats due to many anthropogenic activities. This has resulted in a large decline in wild Tasar cocoon production. Lepidopterans are accepted as ecological indicators of ecosystem health and it is apprehended that through anthropogenic and climatic factors this precious genetic resource, which took millions of years to evolve, may face the threat of extinction shortly if adequate conservation measures are not taken. This paper attempts the geospatial mapping of these ecoraces in the state of Odisha through RS and GIS tools, which will provide a greater scenario for their conservation
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JOSHI, K. L. « A NEW STEM BORER INFESTING TASAR SILKWORM FOOD PLANTS ». Scientific Temper 3, no 1&2 (9 février 2012) : 17–20. http://dx.doi.org/10.58414/scientifictemper.2012.03.1.04.

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The tropical tasar silk is produced by the tasar silkworm, Antherea mylitta Drury. Since therearing is conducted on the trees of Arjun, Termilalia arjuna, Asan, T.tomentosa, Sal, Shorea robustaetc. the qualitative or quantitative production of the silk or seed directly dependent upon the qualityor amount of foliage available and utilized for tasar silkworm rearing. With the infestation of the foodplant by any pests, the production of foliage and thereby, production of tasar silk and quality seedare liable to be affected.The round headed stem borers and the flat headed stem borer are most common. Theseborers affect Arjun (T. arjuna), Asan (T. tomentosa) and Sal (Shorea robusta). Most of the borersattacking tasar food plants belonging to family Cerambycidae and Buprestidae of order Coleoptera.The stem borer infesting T. arjuna reported now is belonging to a new species Sphenopteraaerosa. The new species belongs to the family Buprestidae and the order Coleoptera.Various parameters were studied like symptoms of infestation, survival of plants and damagetype. The infestation of this new species ranged from 19 to 31 % in different blocks of plantation.
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Mandal, Sumit, et Amlan Das. « Tyrophagus putrescentiae (Schrank) (Astigmata : Acaridae) as natural enemy for wood boring pest, Psiloptera fastuosa F. (Coleoptera : Buprestidae) in tropical tasar ». ENTOMON 46, no 1 (31 mars 2021) : 33–40. http://dx.doi.org/10.33307/entomon.v46i1.584.

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In tasar silkworm culture the stem-boring jewel beetle Psiloptera fastuosa Fabr. (Buprestidae: Coleoptera) is considered as a major pest of tasar plant (Terminalia arjuna, Combretaceae) cultivation. The grubs of P. fastuosa often damage the Arjuna stem by causing dieback. Tyrophagus putrescentiae Schrank (Acari: Acaridae) infested buprestid eggs up to 15% and caused egg mortality up to 9%. The mite predation on the buprestid beetle is reported for the first time. The mite seeps the newly-laid egg-fluids causing the egg mortality suggesting that tasar plant stem-boring pest (P. fastuosa) can be partially controlled by the mite as a natural enemy.
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Prabhu, I. G., Mr Manjappa, M. M. Baig, N. Kumar, A. K. Sinha et S. Kutala. « Molecular cloning and development of RAPD-SCAR markers for the selection of thermo-tolerant line of tropical tasar silkworm ». Journal of Environmental Biology 44, no 3(SI) (3 juin 2023) : 464–71. http://dx.doi.org/10.22438/jeb/44/3(si)/jeb-24.

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Aim: To develop random amplified polymorphic DNA (RAPD) -sequence-characterized amplified region (SCAR) markers for selecting thermo-tolerant line of tropical tasar silkworm. Methodology: In the environmental chamber, Daba BV cocoons of A. mylitta were exposed to high temperature at 46°C/4 hr for 3 days. After the emergence, genomic DNA was extracted from thermo-tolerant moths and thermo-susceptible pupae. The genomic DNA was amplified using 30 RAPD random decamer primers. The improved RAPD fragments that can differentiate thermo-tolerant and susceptible line of A. mylitta were eluted, cloned in pJET1.2 vector and sequenced. SCAR markers were developed based on the sequence and validated in the subsequent generations. Results: Among 30 RAPD primers, OPK04, OPAJ15 and OPA17 generated polymorphic bands to differentiate thermo-tolerant and susceptible line of A. mylitta. These polymorphic bands were eluted, cloned and sequenced. Sequencing of three cloned fragments revealed that clone PB1 comprised of 1412 bp, clone PB2 comprised of 704 bp and clone PB3 comprised of 931 bp. Sequence specific stable multiplex SCAR markers TT-PB1, TT-PB2 and TT-PB3 were designed and synthesized. PCR amplification was performed using DNA templates of 10 thermo-tolerant and 10 thermo-susceptible samples. SCAR marker TT-PB1 was observed to be more specific to thermo-tolerant line of tropical tasar silkworm and validation with 25 samples each in next generation also supported the specificity of TT-PB1. Interpretation: Among three SCAR markers, TT-PB1 showed more specificity for selecting the thermo-tolerant line of A. mylitta. Therefore, the study provides an effective and precise PCR-based molecular marker system for selecting thermo-tolerant lines in tropical tasar silkworm to overcome seed crop loss due to high temperature stress in tasar rearing hotter zones. Key words: Antheraea mylitta, cloning, RAPD, SCAR m­­­arker, Thermo-tolerance
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Thèses sur le sujet "Tropical tasar"

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Sinha, Ashok Kumar. « Studies on some aspect of diapouse physiology of the tropical tasar silk worm Antheraea Mylitta drury Lepidoptera:Saturniidae ». Thesis, University of North Bengal, 1997. http://hdl.handle.net/123456789/925.

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Livres sur le sujet "Tropical tasar"

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Mohanty, P. K. Tropical Tasar Culture in India. Daya Publishing House,India, 1998.

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Chapitres de livres sur le sujet "Tropical tasar"

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Barsagade, D. D. « Tropical Tasar Sericulture ». Dans Industrial Entomology, 291–319. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3304-9_10.

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Rai, Manoj M., Mohan Rathod, Suvarna Wazalwar et Suresh Kumar Raina. « Tropical Tasar Insect ». Dans Commercial Insects, 49–81. Boca Raton : CRC Press, 2023. http://dx.doi.org/10.1201/9781003454960-3.

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Elumalai, D., P. Mohan raj, R. Ramamoorthy, C. Mohan et B. Poovizhiraja. « Tasar Silkworms – Biodiversity – Distribution and Eco Races of Temperate and Tropical Tasar ». Dans Introduction to Non-Mulberry Silkworms, 143–50. CRC Press, 2021. http://dx.doi.org/10.1201/9781003197393-24.

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Raju, P. J., D. M. Mamatha et S. V. Seshagiri. « Sericulture Industry ». Dans Environmental and Agricultural Informatics, 366–87. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9621-9.ch017.

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India has a huge potential for sericulture development unlike other agro industries since sericulture is a unique agro-based industry comprising of several components such as mulberry cultivation, silkworm rearing, silk reeling and other connected activities. Each of these components appear to be independent but closely linked with one another having intricacies of their own. The major activities of these components comprises of mulberry food-plant cultivation to feed the silkworms which spin silk cocoons and reeling the cocoons for unwinding the silk filament for manufacturing silk goods, subjecting them to the process of degumming, bleaching, dyeing, weaving and printing. Thus sericulture industry provides employment to approximately 7.85 million in rural and semi urban areas in India. Of these, a sizeable number belongs to the economically weaker sections of the society, including women. In addition to this, India has the unique credibility of producing all the five known commercial silk viz., mulberry, tropical tasar, oak tasar, eri and muga of which muga with its golden yellow glitter is unique and prerogative of India. Though silk is a luxury item, it is produced by the rural populace and purchased by urban rich, causing money to flow from urban to rural. It also prevents rural people to migrate to urban areas. The United Nation's recent endeavor “Millennium Development Goals” has an eight point programme to make our earth more healthy wealthy and free from inequalities by 2015. Sericulture being a rural and women friendly business aligns well with many of these ideas which are explained in detail in the chapter.
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Rapports d'organisations sur le sujet "Tropical tasar"

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Sánchez Lerma, Liliana, et Duvan Fuentes Ramírez. Las garrapatas como vectores de enfermedades infecciosas. Ediciones Universidad Cooperativa de Colombia, novembre 2023. http://dx.doi.org/10.16925/wpri.04.

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Las enfermedades transmitidas por vectores se encuentran diseminadas por todo el mundo y producen tasas importantes de morbilidad y mortalidad dentro de las poblaciones humanas y animales. Las enfermedades transmitidas por garrapatas se encuentran dentro del marco de los síndromes febriles indiferenciados y, por lo tanto, se presentan principalmente con fiebre de inicio súbito, síntomas y signos poco específicos como malestar general, dolor de cabeza, mareo, mialgias, pérdida del apetito, que puede ser en algunos casos fatales. Colombia, por su ubicación geográfica, diversidad de reservorios, vectores y características climatológicas de predominio tropical reúne todas las condiciones que favorecen la diseminación de los vectores. Las garrapatas son vectores de gran importancia, ya que se adaptan con facilidad a los diferentes climas y son capaces de transmitir una gran variedad de microorganismos. Las enfermedades causadas por estos se mantienen en un ciclo enzoótico y endémico y, anualmente, pueden causar brotes, lo cual puede afectar a los humanos en un ciclo epidémico. Este reporte está asociado al proyecto “Estudio sobre ecoepidemiología de enfermedades transmitidas por vectores y enfermedades febriles indiferenciadas en el Caribe colombiano” (INV 2759) de convocatoria externa del 2019 y fue financiado por el IIBT de la Universidad de Córdoba.
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