Published Paper Details:

The utilization of phytoecdysteroid in synchronizing larval-to-pupal ecdysis is the recent technology. Considerably, commendable work has been conducted on utilization of phytoecdysteroid in synchronizing larval ripening, just before the beginning of pupal stage in B. mori. The application of phytoecdysteroid freed the silkworm population from the internal clock and forced the silkworm population to behave as an independent population to complete larval ripening and other components in larval-pupal ecdysial process. Previous studies were mostly of laboratory studies. In this study we tried to initiate to shift these studies from laboratory to the farmers rearing houses. In the silkworm growth, there are several aspects of economic importance such as hatching duration, larval-to-larval moulting durations and larval-to-pupal durations. These measurements in terms of time are dealt separately using index computation in various studies. On the other economic quantitative traits such as silkworm egg hatching percentage, silkworm brushing percentage, larval ripening percentage, cocoon weight, shell weight and shell ratios etc., are to be dealt in a different way, with evaluation index. All the heterozygotic hybrid improvement studies are the economic silkworm rearing characters in standard rearing packages at laboratory level only. Evaluation of such characters under different temperature and humidity conditions at farmer level is studied. In this direction, a common evaluation index, based on the evaluation index value, a method used in educational system in Japan to determine student's merit. It is to be remembered that the multiple trait evaluation index was adapted to judge the superiority of various silkworm hybrids in a different context of farmers' rearing house conditions, using CSR2 x CSR4. In a precise expression, the present study is aimed at quantification measurements of reducing durations (hatching duration, moulting durations, ripening durations etc.) on one hand through computing index values and evaluation of quantitative economic traits (such as egg hatching percentage, brushing percentage, larval ripening percentage, cocoon weight, shell weight, shell ratio etc.,) on other through computing evaluation index are at farmers' rearing house conditions proposed.