Journal of Entomological Research

SCOPUSWeb of Science
  • Year: 2022
  • Volume: 46
  • Issue: suppl

Population dynamics of fall armyworm, Spodoptera frugiperda (J.E. Smith) (Noctuidae: Lepidoptera) on maize

Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, GKVK, Bengaluru - 560 065, Karnataka, India

Abstract

The experiment was conducted over three seasons to know the behavior of the pest in relation to weather parameters. The fall armyworm incidence was noticed throughout year except during April and May months. The larval population was ranged from nil to 2.65 larvae per plant during experimental period. The fall armyworm was abundant during kharif season, but the population found comparatively at low densities during rabi. During summer season, the fall armyworm was appeared in very less numbers. Correlation studies revealed the significant positive correlation between larval population and morning, evening relative humidity (r = 0.888, 0.866). A significant negative correlation was recorded between larval population of fall armyworm and maximum, minimum temperature and sunshine hours (r = -0.875, -0.368, -0.650). A non-significant relation was observed between larval population and wind speed and rainfall.

Keywords

Correlation, Fall armyworm, Zea mays, Maximum temperature, Population dynamics, Relative humidity