Grass wilts despite abundant moisture. Damage begins in late spring and becomes worse with hot, dry weather. Small irregular dead patches converge to form large dead sections. Weakened and dead turf is easily removed, revealing numerous pupae and grubs. Adults are reddish-brown to shiny black beetles, also 1/8 to 1/4 inch long. Ataenius beetle prefers closely mowed bluegrasses and bentgrasses; it is primarily a problem on golf courses (rarely on home lawns).
Control annual bluegrass to make the lawn less attractive to females.