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Journal of Entomology and Zoology Studies
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ISSN Print: 2349-6800 | ISSN Online: 2320-7078

Journal of Entomology and Zoology Studies

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2018, Vol. 6, Issue 2
Studies on age specific fecundity life tables for Helicoverpa armigera Hub., on sunflower (Helianthus annuus L.)

Basavaraj K, Mohan I Naik, Jagadish KS and Shadakshari YG

The objective of the study on life fecundity tables of Helicoverpa armigera Hub., reared on Sunflower (Helianthus annuus L.) cv. KBSH-44 under controlled condition 26 ± 1 °C. The data revealed that the survival of different life stages of H. armigera on sunflower was found to be 3, 20 and 10 days in egg, larval and pupal stages, respectively. The number that survived from egg to adult emergence was 77 individuals. The pre-oviposition period of H. armigera ranged from 36th to 39th day of pivotal age. The maximum mean progeny production by female (mx) per day was 89.17 females per female in the life cycle on the 43rd day of pivotal age that declined to 9.15 females per female (mx) per day on 48th day. The net reproductive rate (Ro) was 281.011 with mean length of generation (T) was 41.40 days. The innate capacity (rm) and finite rate (λ) of the in number was 0.13 and 1.14 females per female per day, respectively. The stable age distribution of H. armigera in its various stages viz., eggs, larvae, pupae and adult contributed to the extent of 46.25, 50.02, 3.09 and 0.62 percent, respectively.
Pages : 1364-1368 | 326 Views | 19 Downloads
How to cite this article:
Basavaraj K, Mohan I Naik, Jagadish KS, Shadakshari YG. Studies on age specific fecundity life tables for Helicoverpa armigera Hub., on sunflower (Helianthus annuus L.). J Entomol Zool Stud 2018;6(2):1364-1368.
Journal of Entomology and Zoology Studies
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