Damage caused by the Black turfgrass Ataenius beetles
Grubs of Black turfgrass Ataenius beetles Ataenius spretulus mainly feed on root system all the species of turfgrass but most damage is prevalent on cool season turf grasses. In case of severe infestation, patches of dead grasses are seen on the lawns and golf courses. Adults of black turfgrass Ataenius beetles do not cause damage to any plant parts.
Black turfgrass Ataenius beetles overwinter as adults in the wooded areas. These overwintering beetles become active in May and June and move in lawns, golf courses and landscapes to lay eggs in the thatch. Eggs hatch into small grubs that feed on turf grass roots just underneath thatch until they mature in late July. Mature grubs then pupate in the soil and adults emerge from pupae in late August. Black turfgrass Ataenius beetles are known to complete two generations in a year.