A variety of products exist that are designed to kill grubs. Scotts Grubex 1, Merit and Mach-2 are chemical compounds which kill young grubs. There are also three natural methods to get rid of grubs: milky spore, neem oil and beneficial nematodes.
Early summer is the best time to spray for grubs, explains Scotts. Grub-killing products are most effective when the grubs are young. Before spraying, mow and water the lawn. De-thatch if thatch is 1/2 inch thick or more. Spray the grub killer over the grass and water again, as the product must soak into the lawn to be affective.