We have done some high end Commercial Golf Courses that have had some severe grubbing problems due to the high grub content in the turf. They generally use a product called Merit for treatment but due to its cost they only were using it on the greens and fairways.
Other areas were sacrificed and weren't treated until it got so bad.
You can educate folks but if they don't have the budget then it doesn't get done. I told them to increase their membership fees slightly and they will have a good budget for next year.
Here is an example of some severe damage areas. Both skunks and coon were caught and shot on the course over a couple weeks time.
There is a quarter used for size comparison to the grubs. When you have 10 or more grubs per square foot you will have near total turf damage and loss.
As you can see from the size of the mature grubs there is some good eating/protein involved for the foraging animals.
If or when using any type of insecticide to control the grub larvae it is important to apply the spray or granules at the proper time of the season to get the best or any results at all. Typically the best time for treatment is before the egg laying begins or shortly there after.
If much later the insecticide will not have any affect upon the grub once it reaches a more mature size..