Seasonal  incidence,  biology  and  management  of  fall army  worm (Spodoptera frugiperda, J.E. Smith) on fodder maize

N.S Kulkarni; M.C Keerth; B.G  Shivakumar

doi:10.59515/rma.2023.v44.i2.24

N.S Kulkarni Southern Regional Research Station, ICAR-IGFRI, Dharwad-580005, India
M.C Keerth ICAR-Indian Grassland and Fodder Research Institute, Jhansi-284003, India
B.G Shivakumar Southern Regional Research Station, ICAR-IGFRI, Dharwad-580005, India

DOI: https://doi.org/10.59515/rma.2023.v44.i2.24

Keywords: Entomo-pathogens, Fall army worm, Fodder maize, Seasonal incidenceShort communication

Abstract

Seasonal incidence of fall army worm in maize at Dharwad indicated its occurrence both in and kharifrabi seasons The incidence was more during the season. Highest incidence of 50% was noticed during last . kharif week of August and second peak incidence of 30% was noticed during last week of December. Correlation between seasonal incidence of fall army worm and weather parameters indicated that there was a significant negative correlation with the rainfall (-0.60**) and morning humidity (-0.50*). Biology of fall army worm indicated that it completed its total life cycle in 31-44 days on maize comprising of six larval instar stages. Among the entomo-pathogens tested against the fall army worm,(2 x 10 cfu/g)Metarhizium (Nomuraea) rileyi 8 was found to be superior and it was at par with neem formulation (azadirachtin 3000 ppm) @ 5ml/l