Abstract Sitophilus oryzae is a major stored grain pest infesting many grains in storage but rice is its main target of attack. It has been seen that the life cycle of insect depends upon many factors such as ambient temperature, humidity, water content of the grain etc. But the ease with which the life cycle is completed also depends on the type / variety of rice on which the insect is thriving. So it is desirable to study the life cycle on different cultivars of rice. Understanding of life cycle helps in management of pest in a better way. Key words: Sitophilus oryzae, life cycle, rice, pest