![]() Silk is popularly known as “Queen of Textiles” in all over the world for the nature of its unparalleled grandeur, sheen, inherent affinity for dyes, high absorbance, light weight, soft touch and high durability. Rearing of silkworm on large scales with great care in both natural and control conditions scientifically for cocoon production is used as the raw material for silk production ( Kamili et al., 2000). Currently,West Bengal accounts for 14.5% of the total country’s cocoon production ( CSB, 2018) and about 2000 villages are directly involved in mulberry cultivation with plantation area of 37,883 acres ( Anonymous, 2016). Sericulture is practiced in many states of India, West Bengal ranks third in mulberry silk production and is highly concentrated in three traditional sericulture districts namely, Malda, Murshidabad and Birbhum, which contributing 90% of the total state’s silk production. Among all silk varieties, mulberry silk occupies 75% of the total silk production. It is one of the vital sub-sectors of agriculture and plays a crucial role in farm economy through providing employment round the year and fetches higher income mainly to the rural farm families ( Roopa and Murthy, 2015 Masrat and Tripathi, 2017). India is the 2 nd largest raw silk manufacturer country and produces five commercially significant silk varieties namely, Mulberry, Tropical Tasar, Temperate Tasar, Eri and Muga ( CSB, 2018). Therefore, it is recommended that the farming of bivoltine silkworm is more gainfulcompared to F1 and multivoltine variety, and capable of more income generation than other traditional agricultural crops. From our findings, it is clear that the culture of bivoltine is preferable for the farmers who don’t have enough landed property and also profitable in terms of cocoon, post cocoon and silk traits. mori were separately clustered based on the positive correlation of measured variables mostly length of silk thread, renditta, dry cocoon weight, the average weight of larvae, present market price, leaves for rearing, net profit and selling price of cocoon per acre farmland whereas, the multivoltine and F1 variety clustered in a separate group. Net profit for bivoltine was significantly increased by 15.65% and 10.21% than multivoltine and F1 varieties, respectively.The heatmap analysis revealed that the bivoltine races of B. We also inquired about capital investment and profit-making of three varieties. Similar trends were obtained in the average length of silk thread from a single cocoon in bivoltine races, higher by 30% and 77.14% from F1 and multivoltine, respectively (P<0.05). The average weight of ten 5th instar larvae of bivoltine was higher in comparison with multivoltine and F1 variety. The results showed that feeding habits of silkworm larvae of three races had significant effect on cocoon parameters. mori by analysed the cocoon, post-cocoon characters, and silk related traits for identifying the best superior races of B. Therefore, the present study has been aiming to find out the comparative performance of bivoltine, multivoltine, and F1 variety of B. But nowadays, farmers have lack their interest in this sector due to low cost benefit ratio, high investment cost in terms of silk worm rearing, land uses and lack of proper knowledge on different races of Bombyx mori. About 2000 villages are engaged in mulberry cultivation with plantation area of 37,883 acres. ![]() Sericulture is practiced in many regions of India, where West Bengal ranks third in mulberry silk production. ![]() India has a prosperous and glorious history in silk production and its silk trade dates back to 15 th century.
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