Red Cotton bug, Dysdercus koenigii (Fab.) is one of the major pest of okra in India. It damages the crop plant by sucking the leaves and the developing fruits. Both adult and nymphal stages reduce the fruit quality and crop yield. Red cotton bug is a small, blood red or dusky brown colored insect. The female lays eggs in the soil and decaying vegetable matter. Its biology, life cycle and bionomics were studied during kharif- 2018. It undergoes hemimetabolous type of development. Female was little larger than the male ones and measured 15.19±0.17 mm length and 8.42±0.32 mm width as compared to male with 13.16±0.94 mm in length and 7.25±0.67 mm in width. There were five nymphal stages that completedtheir development in 33-41 days with an average of 37.30±2.87 days. Life cycle duration varied between 39-48 days with an average of 43.70±3.16 days. The total adult life cycle period of male and female 53-65 days with an average of 59.20±4.32 days and 48-60 days with an average of 54.00±3.82 days, respectively.Fecundity ranged between 54-65 with an average of 60.50±4.30.