After some time the acorn hardens and turns brown, ready for germination. It will fall off the branch onto the ground below. Soon after, a newly hatched weevil larva (grub) will squeeze itself through the small hole created by its parent, slowly forcing its chubby body out of the acorn nut after it has grown from eating the nut meat inside. Once free, the grub will start burrowing into the dirt in order to remain hidden from predators while it develops into an adult.
Acorn Weevils can damage an acorn crop if a tree is infested. This would result in fewer new oak trees in that area. The larvae are a protein-packed food source for many other insects, as well as spiders and small animals. Adult Acorn Weevils are hunted by a variety of Weevil Wasps and will eventually become live meals for hatching wasp larvae.