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Bhattacharyya, Himanish
- A Note on the Secondary Host Plants of Eri Silk Worms in India
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Affiliations
1 Agriculture Vocational Training Centre, Lichutala Vivekananda Adarsha Vidyalaya (H.S.), P.O. Saguna, Kalyani, Pin-741245, Dist. Nadia, Weat Bengal, IN
1 Agriculture Vocational Training Centre, Lichutala Vivekananda Adarsha Vidyalaya (H.S.), P.O. Saguna, Kalyani, Pin-741245, Dist. Nadia, Weat Bengal, IN
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Journal of Environment and Sociobiology, Vol 9, No 2 (2012), Pagination: 191-192Abstract
Eri silk worm, Phylosamia ricini , is a polyphagous lipidopteran insect which feeds on a wide range on host plants, cultivated or naturally grown all over India. Castor ( Ricinus communis ) is the primary host plant but there are a number of secondary host plants belonging to the families, Euphorbiaceae, Simaroubaceae, Rutaceae and Caricaceae which are extensively used for eri rearing in India. The local names and distribution of these plants are provided.- Impact of Coupling Duration on Fecundity and Fertility of some Important Cross Breeds of Bombyx mori L in West Bengal
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Authors
Affiliations
1 Department of Agriculture and Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, North 24 Parganas, West Bengal, IN
2 P. G. Department of Sericulture, Krisnath College, Berhampore, Murshidabad, West Bengal, IN
3 Department of Zoology, Sidho Kanho Birsha University, Purulia, West Bengal, IN
1 Department of Agriculture and Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, North 24 Parganas, West Bengal, IN
2 P. G. Department of Sericulture, Krisnath College, Berhampore, Murshidabad, West Bengal, IN
3 Department of Zoology, Sidho Kanho Birsha University, Purulia, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 13, No 1 (2016), Pagination: 113-118Abstract
Silkworm eggs play crucial role in sericulture industry. For successful production of cocoon crops adequate quantity of good quality egg is essential. In case of silk moth mating time varies from 1 - 4 h which is generally termed as coupling period. The temporal aspects of mating in terms of duration may also have impact on the number of egg laid, pattern of egg laying and their viability. The present investigation intends to find out whether duration of coupling period has any relation with fecundity and fertility of silk moth. The study was conducted with the cross breed of following Bombyx mori breeds: NxM12(w), NxNB4D2, and NxYB. The experiment reveals that total fecundity almost remained same with the variation of coupling duration but fertility is directly proportional to coupling duration and maximum (100%) at 5 h coupling duration.Keywords
Fertility, Fecundity, Coupling, Egg.References
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- Integrated Management of Diseases and Pests of Silkworm
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Authors
Affiliations
1 P2 Basic Seed Farm, Central Silk Board, Purnia, Bihar, IN
2 Central Sericutural Research & Training Institute, Berhampore-742101, West Bengal, IN
3 Department of Agriculture & Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, North 24 Parganas, West Bengal, IN
4 Department of Zoology, Sidho Kanho Birsha University, Purulia, West Bengal, IN
1 P2 Basic Seed Farm, Central Silk Board, Purnia, Bihar, IN
2 Central Sericutural Research & Training Institute, Berhampore-742101, West Bengal, IN
3 Department of Agriculture & Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, North 24 Parganas, West Bengal, IN
4 Department of Zoology, Sidho Kanho Birsha University, Purulia, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 13, No 2 (2016), Pagination: 147-155Abstract
Incidence of diseases and pests is a serious concern in silk production due to prevailing tropical condition. Annual crop loss due to diseases during rearing varies between 15% and 20% in national level and in West Bengal it ranges between 35.7% and 44.7%. Crop losses due to specific diseases are also reported to the tune of 30%-40%. Cocoon crop is also affected due to Uzi fly, Exorista bombycis (Louis) infestation. Extent of infestation in West Bengal and Karnataka is between 40%-75%. Silkworm crop protection has been ingenuously investigated in various dimensions and prophylactic measures were developed. Intervention of crop technologies with adequate extension support crop loss due to diseases, which declined from 35% to 14%. Formulation and recommendation of disinfectants and management of rearing with productive breeds/hybrids ensured crop stability and added income of seri farmers. Elaborate technologies have been discussed for successful cocoon crop.Keywords
Bombyx mori, Sericulture, Integrated Disease Management, Uzi Fly.References
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- Incidence of Silkworm Diseases in Baishakhi (April) Crop of Murshidabad District, West Bengal, India
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Authors
Affiliations
1 Department of Agriculture & Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, 24PGS(N), IN
2 Post graduate Department of Sericulture, K. N. College, Berhampore, West Bengal, IN
3 Department of Zoology, Sidho-Kanho-Birsha University, Purulia, West Bengal, IN
1 Department of Agriculture & Rural Development, Chandraketugarh Sahidullah Smriti Mahavidyalaya, Berachampa, 24PGS(N), IN
2 Post graduate Department of Sericulture, K. N. College, Berhampore, West Bengal, IN
3 Department of Zoology, Sidho-Kanho-Birsha University, Purulia, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 13, No 2 (2016), Pagination: 187-190Abstract
Common diseases of silkworms in West Bengal are White Muscardine (fungal), Grasserie (viral), Flacherie (viral and bacterial complex) and Pebrine (Protozoa). Present study intends to study the prevalence of various silkworm diseases of Baishakhi crop at Murshidabad district, West Bengal. The study finds that Flacherie is more predominant (18%), followed by Grasserie (10.5%) in both lab and land conditions in Baishakhi or April crop than any other diseases at Murshidabad district. However, occurrence of Muscardine and Pebrine diseases in Baisakhi crop of the district is not recorded during the study period.Keywords
Mulberry Silk, Silkworm Disease, Baishakhi Crop, Murshidabad.References
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