author(s)
Sunil Kumar M, Basavaraju BS, Vijay Kumar L, Sanath Kumar VB and Thimme Gowda P

abstract
The present investigation was carried out for assessing yield loss caused by fall armyworm Spodoptera frugiperda J.E. Smith in field condition at college of Agriculture, V. C. Farm, Mandya (Karnataka) during Kharif and Rabi 2019-20. The experiment was carried out at different treatments including different levels of infestation. A maize hybrid, MAH 14-5 was used in this study. Yield loss caused by this pest was estimated by comparing the treatments including different levels of infestation with respect to growth and yield attributing characters. The mean of two seasonal data reveals that lowest grain (57.83 q ha^-1), straw (9.73 t ha^-1) yield and test weight (19.48 g) was at recorded at 25-30 % level of infestation followed by 20 -25 % level of infestation. Similarly, lowest plant height (1.71 m), cob length (16.75 cm), cob diameter (4.40 cm), number of kernel rows per cob (14.37) and number of kernels per rows (36.29) was recorded at 25-30 % level of infestation followed by 20 -25 % level of infestation. this study suggested that application of insecticide at proper level of infestation will reduce the significant yield loss and increases the productivity.