Abstract

In a study on the influence of varieties, spacings and pest management, spraying with monocrotophos 36 WSC at 500 ml/ha. recorded significantly lower infestation of pests and an increase of 10% grain yield. insect resistant cultures IET 6315 and ACM 8 recorded significantly lower incidence of gall midge and stem borer as compared to IR 20. Spacings had no influence on the incidence of the pests and yield. IR 20 at a spacing of 20 x 15 cm, sprayed at ETL recoided the lowest incidence of leaf folder. IET 6315 and ACM 8 recorded significantly lower damage in 20 x 15 cm spacing. The results suggest that gall midge incidence in the moderately resistant varieties can be reduced by adopting a wider spacing and on susceptible varieties with insecticides.

Keywords: Rice, Pest management.