Mosquitoes of the genus "Mansonia" complete their life cycle only in the presence of aquatic plants such as "Pistia", laying their eggs under the leaves. The emerging larvae fall into the water within 24 hours and stay attached to the "Pistia" root (which is rich with air sacs) with the help of a serrated siphon tube for respiration and develop into pupa. The pupa is also attached to the pistia root with the serrated piercing siphon tube. The egg to adult mosquito development is completed within 7 days.