hate the smell of coffee. Put coffee grounds in your soil. The grubs will flee, and you can collect them by hand. The cockchafers will no longer lay their eggs in that spot.
7/9 Diatomaceous earth to eradicate themIf you want to get rid of them permanently, you need to add diatomaceous earth to your soil. It’s a natural insecticide that dries out the parasite’s body and kills it.
8/9 Worms to get rid of the larvae
You can also use nematodes, microscopic worms. They are predators