The red palm weevil is considered as one of the major pests of date palms and coconuts. Damage to palms and coconuts is mainly caused by the grubs that tunnel into tree trunks and feed internally on the plant tissue. The major symptoms of grub damage include an eccentric growth of crowns, presence of several holes at the base of cut palms, wilting and necrosis of the foliage. In case of severe infestation, red palm weevils can cause complete loss of foliage, rotting of trunks and at the end the death of the trees.
The red palm weevils complete all the four life stages including egg, grub, pupa and adult inside the host plants. Females generally lay eggs in the wounds caused either by their feeding activity or by mechanical cutting of palm trees. Eggs hatch within 4-5 days into small grubs that burrow into palm trees and start feeding on the soft tissue. These grubs develop through 3- 7 stages within a couple of months. Then mature (last instar) grubs built a pupal case (cocoon) from palm fibers within the palm frond and pupate inside the cocoon. Adults of red palm weevil emerge from pupae within 15- 20 days. Females lay eggs and life cycle continues.