Grub infestations in your lawn can be difficult to identify and challenging to implement a control program. In some cases, by the time the damage is seen, or identified as a grub problem, it may be at the expense of a nice, well maintained lawn. White grubs or lawn grubs are the larvae of the beetle. High numbers are usually evident in late spring or early summer, but populations can fluctuate from year to year. 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 is caused in the early part of the summer. The grubs can be found in bunches on your lawn inside a small area. When you see more than 8 to 10 grubs per square foot of lawn it may be time to start thinking about treating for the problem. Heres how to check your population numbers: Dig up an area of your soil, take about a 12 x 12" square area and count the number of grubs that you find. If the total in that area is more than 8 to 10 grubs, it is time to treat. A healthy lawn can withstand small grub populations, but will begin to show signs of damage once those populations grow.