Hi Jayne,

I have a few questions for you:

• Have you seen the grubs? Or, are you noticing the area of lawn a brown or dead? Are you noticing any webbing or other signs?
• Have you done a "tug test"? Tug on the turf grass. Does it peel up easily, or is the turf still rooted in the ground?
• Can you send photos of the grubs and also the turf damage? Photos close up of the damage, and further away to see the turf in the landscape is very helpful!  
• What products have you used to treat grubs? How often? When?

Since you've tried both professional services and products from the hardware store, and you are still experiencing issues with the turf, I am wondering if you might have another issue. 

A little more information will be helpful so we can provide a recommendation! 

You can also bring a sample of the grubs to the Arapahoe County Extension office at 6934 S. Lima St. Suite B, Centennial, CO 80112. We have a sample ID fee of $8. We are open Monday through Thursday 8-4:30pm. We can get the exact ID of the grubs through a sample. However, feel free to send in photos (a free service).  

Look forward to hearing from you! 

Thanks,

Lisa

Lisa Mason
Horticulture Specialist, Entomologist
Colorado State University Extension, Arapahoe County