Grubs are beetle larvae that live in the soil of your lawn and eat your grass's roots. This causes your grass to die. If you see a patch of yellow grass, you may find that you actually have a few grubs living underneath. If you want to have a healthy lawn, you must learn how to get rid of the grubs that are infesting your lawn.
Mix 20 ml of neem oil with one liter of water. This is a typical measurement; if your neem oil label has a different ratio, follow that. Neem oil is more of a natural insecticide, and it has the ability to repel the grubs in your lawn. All you have to do is spray the solution on the top of the soil where you found grubs.
Mix a packet of nematodes with the amount of water listed in the instructions. Spray the nematodes over the infected area of your lawn. Nematodes are tiny roundworms that will get inside the grub. The nematode will then let out a bacteria that kill the grub.
Infect your lawn with Milky Spore disease. Don't worry; Milky Spore disease will not harm your soil in any way. The grubs, however, will eat the milky spores and die. Purchase milky spores at a garden center, or online.
Use a chemical insecticide as a last resort. Spray an insecticide with the chemical trichlorfon over the infected areas of your lawn. Follow all the instructions on the insecticide label.