Informatics Publishing Limited

Arindam Chakrabortty ¹, Gopinath Baur ¹, Sanat Roy ¹, Sudeshna Ghoshal ¹, Alak Ranjan Goswami ¹

Affiliations
1 Department of Sericulture, Krishnath College, Berhampore, Murshidabad-742101, West Bengal, IN

Abstract

A major factor determining the productivity and the profitability in sericulture is the yield of mulberry crop. Maximization of leaf yield of mulberry per unit area will lead to increase cocoon production at reduced cost. Thus, it should be the primary aim of the sericulturists to maximize leaf production. As a result of experimentation over a number of years on various aspects of mulberry cultivation, viz, variety, spacing, planting season, method of planting, irrigation, manuring, pruning, etc, a package of practices comprising all the factors was formulated and recommended to the field to maximize the leaf output. The "package of practices" differs with different agroclimatic conditions and topography of the area.

Keywords

Mulberry, Irrigated Land, Rainfed Land.

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Sagnik Kumar Ganguly ¹, Arindam Chakraborty ², Gopinath Baur ³, Sanat Roy ³, Subrata Trivedi ³, Kunal Sarkar ³

Affiliations
1 1 Debitala lane, Ichapur, 24-Parganas (N), West Bengal 743144, IN
2 Department of Serculture, Krishnath College, Berhampore, West Bengal, IN
3 Post Graduate Department of Serculture, Krishnath College, Berhampore, West Bengal, IN

Abstract

Total Hemocyte Count in spinning silkworm, Bombyx mori L. was studied using four popular multivoltine races of India. Hemocytic concentration of larva was gradually decreased in every spinning day then again increased with pupal maturity. It was a common character for all the four races in the larva to pupa transition stage. Spherulocyte abundance and prohemocyte absence are other general features in the pre-pupal stage in these four races. It is shown that spherulocytes are derived from granulocytes.

Keywords

Hemocyte, Pre-Pupal Stage, Bombyx mori.

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Susanta Kumar Chattopadhyay ¹, Amalesh Choudhury ², Sanat Roy ¹

Affiliations
1 Department of Sericulture, Krishnath College, Berhempore, Murshidabad-742101, West Bengal, IN
2 S. D. Marine Biological Research Institute, Sagar Island, 24-Pg(s), West Bengal, IN

Abstract

Common diseases of silkworms in West Bengal are White Muscardine (fungal), Grasserie (viral) and Flacherie (viral and bacterial complex) and Protozoan disease Pebrine. Only pebrine is transovarial; hence it is most dangerous. But this disease incidence is now reduced after establishment of seed organization and systematic mother moth examination. All the above diseases are lethal and infectious. Preventive measures should be taken during silkworm rearing to avoid these diseases. In the present communication symptoms, causal organisms, route of infection and control measures of thse disease are discussed.

Keywords

Silkworm, Diseases, West Bengal.

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