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Department of Entomology, S.V. Agricultural College, ANGRAU, Tirupati-517502.
Maize (Zea mays L.) is considered as queen of the cereals and is one of the most important crop next to rice and wheat
in global agriculture. It has very high yield potential and there is no such cereal crop on the earth which has such immense potentiality. Globally it is highly valued for its multiple uses such as food, feed, fodder and raw material for large number of industrial products. Fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) is a dangerous transboundary pest, can cause significant yield losses if it is not managed well in time. Hence bioassay studies were conducted on third instar FAW larvae from F1 population of field collections from chittoor of Andhra Pradesh using diet incorporation assay (IRAC test method) to check the resistance monitoring. The studies on the resistance levels in S. frugiperda to five insecticides viz., emamectin benzoate, chlorpyriphos, lambda-cyhalothrin, chlorantraniliprole and spinetoram. revealed the high level of resistance to conventional insecticides like chlorpyrifos (114.8 folds), lambda cyhalothrin (19.4 folds), and low level of resistance to new chemicals like chlorantraniliprole (12.5 folds), spinetoram (10 folds) and emamectin benzoate (3 folds).
KEYWORDS: Fall armyworm, Resistance monitoring, Resistance level.