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Ecologia

Year: 2012 | Volume: 2 | Issue: 2 | Page No.: 43-51
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Authors

Dinesh Kumar

J.P. Pandey

Jugnu Kumari

A.K. Sinha

B.C. Prasad

Keywords

Research Article

Evaluation of Antheraea mylitta Cocoons Preservation for Synchronize Seed Production Through Eco-tasar-friendly Technique

Dinesh Kumar, J.P. Pandey, Jugnu Kumari, A.K. Sinha and B.C. Prasad
Tropical tasar silkworm, Antheraea mylitta produces tasar silk having vast demand in national and international market due to unique quality. During the long period of diapause and quiescence, the cocoons face extremes of temperature (10-46°C) and humidity (30-80% RH) which cause pupal mortality, decreased vigour of moths during grainage and unseasonal emergence. All these losses during the long adverse period of diapause and quiescence require to be reduced to the minimum, so that maximum utilization of seed cocoons is ensured and optimum production of disease free layings is achieved. Cocoon loss in diapausing stock sometimes attains serious proportion. As normal practice, seed cocoons of A. mylitta are used to preserve in different conditions during period of diapause to minimize the loss. In the present study, evaluations of A. mylitta cocoons preservation in concrete grainage house and agro shade net grainage house have been done for synchronize seed production through eco-tasar-friendly technique. Comparative grainage behavior of tasar silkworm in these two modes of cocoons preservation revealed highly significant differences in all grainage parameters. Higher synchronized moth emergence, more coupling percentage, less span of emergence peak was found in cocoons preserved in agro shade net grainage, in comparison to concrete grainage house where higher pupal mortality, abnormal moths and less coupling percentage were observed. Our result clearly indicates that, preservation of seed cocoon under agro shade net grainage house is suitable for seed production.
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