Population Dynamics of Fall Army Worm Spodoptera Frugiperda (J E Smith) on Maize

Authors

  • N. Muthukrishnan Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • P. S. Rajisha 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
  • R. Karthikeyan Department of Farm Management, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu

DOI:

https://doi.org/10.55446/IJE.2021.337

Keywords:

Maize, Spodoptera frugiperda, population dynamics, trap catches, temperature, relative humidity, rainfall, correlation and regression coefficients, pheromone trap, larval counts

Abstract

Population dynamics of the fall army worm (FAW) Spodoptera frugiperdaon maize was carried out at
the research field of Tamil Nadu Agricultural University, Coimbatore (kharif and rabi, 2018 and 2019).
The results revealed that maximum FAW trap catches were obtained during 34th(7.6 moths/ trap) and 5th(7.8 moths/ trap) standard weeks (SW) of kharif and rabi seasons of 2018, respectively. During 2019, a more or less similar trend was observed with a maximum during 31st(7.2 moth/ trap) and 48th (8.2 moth/ trap) SW of kharif and rabi seasons, respectively. Correlation with weather factors indicated a significant negative correlation with evening relative humidity (RH) and significant positive correlation with morning RH during 2019-20. No significant effect of weather factors was observed during 2018-19 except for a significant positive correlation with evening RH and rainfall. The correlation between larval counts and pheromone trap catches were significantly positive with r-value of 0.55 and an R2value of 0.907 during 2018-19.

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Published

2022-07-26

How to Cite

Muthukrishnan, N., Rajisha, P. S., Jeyarajan Nelson, S., Jerlin, R., & Karthikeyan, R. (2022). Population Dynamics of Fall Army Worm <i>Spodoptera Frugiperda</i> (J E Smith) on Maize. Indian Journal of Entomology, 84(1), 134–136. https://doi.org/10.55446/IJE.2021.337

Issue

Volume 84, Issue 1, March 2022

Section

Research Communications
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Europe PMC

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