How do I know I have Grubs? Damaged or dead patches of lawn will appear in mid-August through September.  Typically, the grass will pull away like a piece of carpet.  Once you move the grass away the Grubs will be right there, on the surface.  Real damage can occur when there are as little as 5 Grubs per square feet and some spots can have up to 20 Grubs per square feet.

 

 

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