White Grub Control in your lawn can be difficult to identify and sometimes deal with. In some cases by the time you see the damage or know you have a grub problem it may be to late. And the damage may be already done, White grubs or lawn grubs are the larvae of the beetle. High numbers are usually evident in late spring or early summer. The biggest problem causing beetles are the Japanese Beetles Masked Chafers, and Asiatic and Jun Beetles. The greatest amount of damage from the White Grubs are caused in the early part of the summer.