What are grubs and why are they so destructive?
Grubs are the larval stage of several different types of beetles and chaffers. Adult beetles and chaffers lay their eggs in early summer after emerging from the soil. The larvae then grow during the summer months, over winters in the lawn and emerges as an adult the following year in late spring to early summer. During their growth and development, grubs feed on organic matter in the soil. The thatch layer just under the turf is high in organic content. The grubs tend to feed just under the thatch layer by chewing through the roots of the turfgrass plant. By late summer the evidence of grub damage becomes apparent when lawn areas suddenly turn brown, due to lack of roots and water, and can be rolled up like carpet because the root system is no longer holding the grass in place.
