M. LAVAN KUMAR REDDY*, A. RAJESH, K.V. HARI PRASAD AND B. RAMANA MURTHY

Department of Entomology, S.V. Agricultural College, ANGRAU, Tirupati

ABSTRACT

Seasonal incidence of Spodoptera frugiperda (J.E. Smith) on sweet corn was carried out during Kharif, 2019 at dry land
farm, S.V. Agricultural College, Tirupati with three dates of sowing at fortnightly intervals starting from June 15th. Incidence of
S. frugiperda was low in early sown crop (June 15th) when compared to the mid (July 1st) and late sown crop (July 16th).
A significant negative correlation was observed between S. frugiperda incidence and rainfall in early sowing. In mid sowing
S. frugiperda exhibited negative correlation with morning and evening relative humidity (R.H). The population of S. frugiperda
in late sown crop exhibited significant negative correlation with rainfall. Per cent leaf damage and plant damage was low in early
sown crop compared to mid and late sown crop. The present result revealed that early sowing (15 days) of sweet corn will reduce
the incidence and damage of S. frugiperda in sweet corn.

KEY WORDS:

Corn, fall armyworm, seasonal incidence, Spodoptera frugiperda.