Madras Agricultural Journal
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Research Article | Open Access | Peer Review

Life table and intrinsic rate of increase of Earias vittella Fabricius on bhendi and cotton

Volume : 89
Issue: Oct-dec
Pages: 688 - 690
Published: June 18, 2023
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Abstract


Investigations were made on life table of Earias vittella on bhendi and cotton. The survival (IX) from egg to adult emergence was 0.39 on bhendi and 0.33 on cotton. The adults attained the greatest mean progeny production per day (mx) of 44.0 on 30th day on bhendi and of 44.2 on 31st day on cotton. The net reproductive rate (Ro) was 57.23 on bhendi and 49.06 on cotton. The innate capacity for incrase (rm) was 0.1387 on bhendi and 0.1292 on cotton while the finite rate of increase (1) was 1.15 females/day on bhendi and 1.14 females/day on cotton. The mean generation time (TC) was 29.49 days on bhendi and 30.48 days on cotton. The doubling time (DT) of the population was 5.00 days on bhendi and 5.36 days on cotton. The population. would multiply 2.64 times on bhendi and 2.47 times on cotton.

DOI
Pages
688 - 690
Creative Commons
Copyright
© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords


Bhendi Cotton Earias vittella Life table Reproductive rate.
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