Judicious use of insect controls on turf is always a part of any good, responsible turf management program.  For turf areas where it was elected to fore-go any preventative treatments, now is the time to be checking soil and turf root zone for the existence of grubs and the decision to treat or not treat be made. Here's some steps to help you decide:   

• Select an average looking area of the turf to be examined
• Measure and mark a one square foot area to be excavated
• Dig up and remove the sod and soil to a depth of 6 inches  and place on a tarp or in a bucket
• Carefully sift through the loose soil looking for grubs. This can be done by shaking soil through a ¼ inch wire mesh or by spreading soil out thin on a tarp
• Also pick apart the sod and roots carefully looking for grubs. Remember they could still be relatively small at this time
• If you find 4 or more grubs per square foot this is considered the threshold for noticeable or significant turf damage and treatment should be considered
• One of the best options for treatment is Dylox  6.2G.  Remember Dylox 6.2G must be watered into the soil immediately to be effective

Remember to read, understand and follow any pesticide label before use