Drones were being used to spray insecticides on locusts' swarms as they reached Agra on June 30.
Administration is on alert and warning has been given in the residential areas.
People have been asked to follow guidelines issued by the government on locust attack.
Agricultural Department, Assistant Director SN Singh, said, "Since 4 am the work is in progress and around 60% locusts have been killed.
4 drones were also used and now the swarm will move towards Bharatpur and Mathura."
