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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Turf > Irregular patches > Turf grass easily rolls back when pulled

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Turf > Irregular patches > Turf grass easily rolls back when pulled

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  • Image: white grub 1
  • Image: white grub 2
  • Image: white grub 3

White Grub

  • Typically first noticed mid to late summer.
  • Roots mostly missing.
  • 1/2 to 1 inch white grub may or may not be present.
  • Identify a grub problem by examining a square foot sample of lawn along the border where dead or damaged grass meets healthy grass.
  • When there are many grubs, the grass blades pull away from the roots and the turf rolls back like a carpet.

Management

  • An expert can determine the species of white grub.
  • It is easier to identify the species of the adult beetles.
  • Skunks and moles eat grubs but grub control does not correct damage to lawns by skunks and moles.
  • Control adult beetles if they are damaging ornamental plants.
  • Do not treat for grubs in the fall because grubs move down into the soil for the winter.
  • More information on white grubs

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