Brown spots in your lawn may signal that grubs are present and feasting on grass roots. To determine if grubs are the culprit, pull on the brown grass. If it pulls free with no roots, carefully dig and lift a section to check for c-shaped grubs.
It’s worth trying to control grubs this fall, because in spring they’ll continue their underground lawn destruction.
Other signs of lawn grubs: skunks, raccoons or armadillos burrowing into lawn; flocks of birds feeding in the lawn.
Target plants include: grubs feed on turf roots; adult beetles attack many garden plants earlier in summer; if you saw many Japanese or chafer (June-type) beetles in early summer, you may have grubs.