Pinch the grub gently between thumb and forefinger, with head and abdomen facing you and positioned as in the above figure.Ģ. Using a hand lens and correctly holding grubs for identificationġ. For an overview of approaches to sampling see our brochure, Grubs in Your Lawn. Grubs can be found at many times during the growing season, however the important window for making accurate assessments of most grub populations and for curative management spans August through October/November depending on conditions.Ī narrow spade or golf cup cutter are best for grub scouting.

Because of this, it is important to make accurate species-level identifications and refer to treatment thresholds to determine if management is required. However, white grub populations can be patchy, and grub species vary in the degree of damage they cause to crops. Because of this grubs are often managed using preventive pesticides with no knowledge of the pests presence, identity, location or population size. White grubs problems can be challenging to diagnose.

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