Grubs live in your lawn, feasting on the grass. This can cause your lawn to look dead, less healthy, and completely unattractive. Not only do the grubs make your lawn look unhealthy, but the presence of grubs can actually invite other dangerous wildlife into your yard. Here are some helpful tips from Wikihow and Gardening Know How to get your lawn looking healthy again.
The best defense is always the best offense, or in this case, the preventative measures are just as important as the treatment plan. Keep your grass about 2 1/2 to 3 inches long. Beetles dislike laying eggs in longer grass, and this will prevent the infestation of grubs in the future.
Not only does keeping your grass long help with the prevention of grubs, but over seeding your lawn in the fall helps as well. The over seeding helps your grass to come in thick, again, making it harder for the beetles to lay eggs.
Image from here.
Grub eggs typically hatch in early July, so it is best to kill the pests before they hatch. Treat your lawn with a product containing imidacloprid or halofenozide. The chemicals will kill the eggs as they hatch. (Merit is a good product to use, and can be bought at any home improvement store)
If the eggs have already hatched, it is best to apply treatment in the late summer. The grubs are small and close to the surface of the lawn at this point in the year, making treatment easier. If they have already hatched, Dylox is the best product to use, as it is fast acting.
As always, reading the directions on the back of the products is crucial, as these products do contain chemicals, and can cause harm if used wrong.