Construction of Life-Tables for some Bi-Voltine crosses of mulberry silkworm (Bombyx mori Linnaeus) under lab condition
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Date
2013
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Sardar Vallabhbhi Patel Universiy of Agriculture And Technology Meerut (U.P.)
Abstract
The commercial production of silk is called as “Sericulture” Which is a labour intensive, agro-based cottage industry, ideally suited not only to India but to all developing country of tropical belt. Mulberry Silk worm (Bombyx mori. L) is an monophagous and multivoltine insect without diapauses. The Present study entitled “Construction of Life-Tables for some Bi-Voltine crosses of mulberry silkworm (Bombyx mori Linnaeus) under lab condition” was carried out on Sericulture Research, Demonstration and Training Unit lab, Department of Entomology, College of Agriculture, S. V. P. University of Agriculture and Technology Modipuram, Meerut (U.P.) during 2011-12.
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Investigations were undertaken to record the (i) Construction of age specific life table. (ii) Construction of stage specific life table (iii) Construction of life and fertility table for female. The age specific life table revealed that the age specific survivorship on the two hybrid cross of mulberry silkworm viz, NB4D2×SH6 and KC2×FC1. The Bombyx mori L. hybrid cross NB4D2×SH6 took the shortest time 37 days to completes its generation while hybrid cross KC2×FC1 required the maximum, 43 days. The apparent highest mortality rate was recorded on NB4D2×SH6 (14%) and the lowest (11%) on KC2×FC1 at room temperature and the potential fecundity. Was recorded 333 on NB4D2×SH6 and the lowest 314 on KC2×FC1 at control temperature. Based on the results obtained from the present study, it may be concluded that among the hybrids cross of mulberry silkworm NB4D2×SH6 was the most economic hybrid cross of mulberry silkworm for the sericulture growers.
Description
Construction of Life-Tables for some Bi-Voltine crosses of mulberry silkworm (Bombyx mori Linnaeus) under lab condition
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Citation
Construction of Life-Tables for some Bi-Voltine crosses of mulberry silkworm (Bombyx mori Linnaeus) under lab condition