Japanese beetles are a common yard pest that can be particularly troublesome. They are very destructive to grass, plants and trees because they feed on them in all stages of development.
They start out as grubs, little C-shaped worm looking things. While in the grub stage they feed on the roots of grass and can totally ruin a yard if not controlled. If your grass is dying in patches for no apparent reason, you may have grub problems.
Once they grow into beetles, they continue to wreak havoc. They will eat the leaves of your shrubs, trees and plants. You will see lots of little holes in the leaves and this can really harm your plants.
There are ways to control them, both natural and using chemicals. I’ve found a couple of videos that may help. Here they are.