Japanese beetles are invasive insects that feed on a wide variety of plants, causing damage to crops and gardens. They are known for their metallic green bodies and copper-colored wings. Grubs are the larval stage of Japanese beetles, living in the soil and feeding on plant roots. When the grubs mature into adult beetles, they emerge from the soil and continue to feed on plants above ground.
Japanese beetles
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 spread mulch around plants to kill grubs in the soil. As the name suggests, these beetles are only found in Japan.
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.
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!)
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.
you find grubs in a wet area underground
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.
Many different birds eat Japanese beetles; however, they prefer to dine on the grubs.Predaceous insects such as the praying mantis occasionally feed on adult beetles and grubs, as do a few native wasps and flies.Several parasitic wasps, flies and plant-friendly beetles have been imported in an attempt to control the beetles, but have seen only limited success.