Biology and Nutritional Indices of the Fall Army Worm Spodoptera Frugiperda (J E Smith) on Maize

Authors

  • P. S. Rajisha Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • N. Muthukrishnan Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • S. Jeyarajan Nelson Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • R. Jerlin Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • P. Marimuthu Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • R. Karthikeyan Department of Farm Management, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu

DOI:

https://doi.org/10.55446/IJE.2021.328

Keywords:

Spodoptera frugiperda, maize, fecundity, egg, larval, pupal periods, lifecycle, stages, larval instars, head capsule width, Dyar’s law, nutritional indices, consumption, digestibility, conversion

Abstract

Lifecycle, progressive growth of larval head capsule, and nutritional indices of Spodoptera frugiperda (J E Smith) on maize (Co-H6) were studied at the Department of Agricultural Entomology, TNAU, Coimbatore during 2018-19. Incubation, total larval, and pupal periods were observed as 2-3, 13-20, and 7-11 days, respectively. The total lifecycle of male and female was 33-46 and 35-47, respectively. The head width was observed to be 0.34, 0.60, 0.89, 1.32, 1.86, and 2.36 mm from the first to the sixth instars, respectively. Linear regression analysis showed a significant relationship between larval instars and head capsule width (R2=0.0979); and geometric progression ratio was observed as 1.48. Nutritional indices were also studied for the third and fifth instar on the maize plants. Consumption index (CI) and approximate digestibility (AD) increased with larval age, while efficiency of conversion of ingested food (ECI) and efficiency of conversion of digested food (ECD) were inversely related to age. These values for the third and fifth instar were- CI= 2.30 and 2.31; AD=35.7 and 40.29; ECI=18.33 and 12.21; ECD=51.33 and 30.3, respectively.

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Published

2022-07-27

How to Cite

Rajisha, P. S., Muthukrishnan, N., Jeyarajan Nelson, . S., Jerlin, R., Marimuthu, P., & Karthikeyan, R. . (2022). Biology and Nutritional Indices of the Fall Army Worm <i>Spodoptera Frugiperda</i> (J E Smith) on Maize. Indian Journal of Entomology, 84(1), 92–96. https://doi.org/10.55446/IJE.2021.328

Issue

Volume 84, Issue 1, March 2022

Section

Research Communications
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Europe PMC

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