White grubs in our soils are generally the larvae of the Japanese beetle or the masked chafer. They are rarely in quantities that cause damage to turfgrass in Arkansas. If there are 5-6 grubs per square foot, it’s possible to start seeing damage on fescue lawns. Grub damage on Bermuda or zoysia lawns in Arkansas would be very unlikely. Even if the number of grubs were great enough to cause damage, the grass itself would recover from the damage quicker than the damage occurs.
Many people ask us to spray for grubs in order to help control mole problems. We are happy to do this when asked. However, we are also careful to educate our customers that the main food source of the mole is the earthworm. Getting rid of the grubs may help eliminate a delicacy for moles, however, we cannot guarantee that grub treatment will help get rid of your moles.
There is some relevance in spraying for grubs to stop them from reaching the adult stage (Japanese beetles). Unfortunately, spraying your lawn for grubs is not going to keep future adult beetles from emerging from your neighbor’s lawn or the surrounding environment. These emerged adults can still find your plants, even if they did not emerge from your lawn.