Author(s):

Anandhi S, Saminathan VR, Yasotha P, Sharavanan PT and Venugopal Rajanbabu

Abstract: Maize (Zea mays; Poaceae) is an important stable food (17%) and fodder crop (61%) next to rice and wheat. To study the seasonal variations and spatial distributions of fall armyworm Spodoptera frugiperda (J. E. Smith) on maize in Cauvery Delta Zone, random survey was made during 2019 -2020 at kharif and rabi seasons at six locations. The larval population was maximum during kharif (0.99 to 3.66 larvae per plant) compared to rabi (0.66 to 2.60 larvae per plant) in all the locations. Among six various locations, maximum population was recorded at Devanur (0.91 to 3.66 larvae per plant) during kharif and at Veppanthattai (0.90 to 2.60 larvae per plant) during rabi season. 27^th Standard Mean Week (3.13 to 3.66 larvae per plant) during kharif and 45^th Standard Mean Week (2.01 to 2.60 larvae per plant) during rabi recorded the maximum larval population.

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