Yes they do this each year. You can stop it from happening by using Milky Spore. It kills the Japanese beetle grubs before they emerge into adults.
Japanese beetles
No. Witchetty grubs are the larvae of cossid moths. See the related link. Curl grubs turn into Christmas beetles and other scarab beetles. See the related links.
Japanese beetles spread mulch around plants to kill grubs in the soil. As the name suggests, these beetles are only found in Japan.
Certain beetles and other insects.Certain beetles and other insects.Certain beetles and other insects.Certain beetles and other insects.Certain beetles and other insects.Certain beetles and other insects.
Grubs
Grubs
Grubs! You know those ugly grayish-white grubs you dig up sometimes when digging in the spring? They are most likely the larval form of Japanese beetles - and guess what they feed on, before they hatch out of the ground to feast on your garden plants? They feed on the roots of your lawn! (There are a few other kinds of grubs that also eat grass roots - namely chafer beetle grubs and June beetle grubs - but at least their adult versions don't decimate our fruits and vegetables and flower gardens as well!)
you find grubs in a wet area underground
a waxworm makes a cacoon and then turns into a moth
Moleswarthogs
A grub’s mother is a female insect that lays eggs, which then develop into grubs. Grubs are the larval stage of insects like beetles, so their mothers would be the adult beetles that laid the eggs.
The mother of an insect called a grub is typically referred to as an adult beetle, as grubs are the larval stage of beetles. Depending on the specific species, the adult female beetle lays eggs in suitable environments, where they hatch into grubs. Grubs are often associated with various types of beetles, including those in the family Scarabaeidae, commonly known as scarab beetles.