Problem: Black Turfgrass Ataenius Beetle
Ataenius spretulus This beetle prefers closely mowed annual and Kentucky bluegrasses and bentgrasses. Only one generation occurs per year in the North; two or three generations occur from the middle latitudes south. Adults overwinter in nearby wooded areas, among leaf litter and mulch, and return to turf in early spring. The grubs cause damage by feeding on roots where soil and thatch meet. Damage is heaviest just before larvae pupate in early summer.
Control annual bluegrass to make the lawn less attractive to females.