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Ranchi, India

Reddy R.M.,CTR and TI | Sinha M.K.,CTR and TI | Tarakanadha B.,CTR and TI | Prakash N.B.V.,CTR and TI
Indian Silk | Year: 2010

There is a need for appropriate handling of parental tasar silkmoths for improved seed productivity and quality at different stages in the grainage. The emergence duration, synchronization of males and females, coupling ability and proper oviposition of moths are important, in addition to their systematic handling by trained personnel. The unempirical handling of silk moths certainly affects the quantity and quality of tasar seed especially, while synchronizing male and female moths for coupling, preserving male moths for subsequent mating, ovipositing female moths for proper egg laying. The poikilothermic nature of tasar silk moth and its least tolerance to fluctuating abiotic factors alters its reproductive behavior, especially the mating propensity. The application of simple, cost effective and electrically independent technologies like sand beds with millets or barley, water filled new earthen pots, double walled brick chamber and low cost environator can enhance commercial tasar seed productivity and superiority.

Kar P.K.,CTR and TI | Srivastava A.K.,CTR and TI | Sinha R.B.,CTR and TI | Sinha M.K.,CTR and TI | Vijayaprakash N.B.,CTR and TI
Indian Silk | Year: 2010

The tropical tasar silkworm, Antheraea mylitta Drury showcases a great biodiversity, comprising many eco-races distributed over a wide range of geographical conditions. The majority of tasar cocoon production in the country comes from the natural Sal forests and is found difficult to rear tasar silkworm on Sal trees under semi-domesticated conditions. Sal based silkworm eco-races possess some uniqueness in comparison to others. The quantitative traits of Sal and Terminalia based eco-races reveal that Sal-based tasar silkworm cocoons are tough built with high amount of silk and superior denier. Anthropogenic activities such as cutting down of trees for timber purpose, road and highway construction, building of dams, mining, industrialization, human habitation, increase in human population and increase in pollution are directly responsible for depletion of forest cover. Genetic erosion is prevented by prohibiting further exploitation of the eco-races and their variants.

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