Which turf condition most strongly indicates white grub infestation?

Which turf condition most strongly indicates white grub infestation?

• A. Thinning turf with irregular patches
• B. White grub infestation
• C. Yellowing across the entire lawn
• D. Spotted moss growth

Answer: (B)

The strongest clue that turf is infested with white grubs is direct evidence of the pests in the root zone. If live grubs are found feeding on roots, you have a definite cause for the damage you’re seeing, making this the most specific and reliable indicator of a grub problem. In contrast, thinning turf with irregular patches can come from many factors—drought, soil compaction, diseases, or other pests—so it’s not as specific to grub activity. Yellowing across the entire lawn signals broad stress like drought or nutrient imbalance rather than a localized grub issue. Spotted moss growth points to moisture and shade conditions, not grub damage. Therefore, finding the actual grubs themselves is the best indicator of a white grub infestation.

The strongest clue that turf is infested with white grubs is direct evidence of the pests in the root zone. If live grubs are found feeding on roots, you have a definite cause for the damage you’re seeing, making this the most specific and reliable indicator of a grub problem.

In contrast, thinning turf with irregular patches can come from many factors—drought, soil compaction, diseases, or other pests—so it’s not as specific to grub activity. Yellowing across the entire lawn signals broad stress like drought or nutrient imbalance rather than a localized grub issue. Spotted moss growth points to moisture and shade conditions, not grub damage. Therefore, finding the actual grubs themselves is the best indicator of a white grub infestation.