There is another eco-friendly approach that can be taken and that is using neem oil. The oil, which is commonly stored in a garden shed, can be mixed with water – at a rate of two tablespoons of neem oil to a gallon of water – and sprayed on a grub infested lawn to tackle grub problems. Use it as a treatment when there are signs of grubs and apply in the spring or early summer. Simply spray on the brown areas where grubs have been prevalent and continue to apply it once a week until it looks like there are no more signs of grub activity.