![]() A few of these pests shouldn’t stress your grass, but a large number of them can cause serious damage. Presence of many grubs in the soil: A major sign of grub infestation in your lawn is the presence of the milky-white, C-shaped worms in soil samples cut from your yard.If you notice there’s increased activity of these predators digging your lawn, it could be a sign there are grubs in your lawn. Increased raccoon and bird activity: Birds, moles, and raccoons feed on worms and other insects in the lawn.To test this symptom, you can do a tug test on your grass to see if it pulls up too easily. A spongy turf: Grubs will damage the roots of turfgrass, leaving the grass easy to pull and roll up just like carpet.Check out this great article I did on other causes of brown patches in lawns. This occurs because grubs feed on roots, thus killing your turfgrass easily. Dead patches in the lawn: You’ll observe patches of brown or dead spots as the grass starts to thin out, turn yellow, and die.
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