Which pest would commonly affect Kentucky bluegrass?

The annual bluegrass weevil is particularly harmful to Kentucky bluegrass due to its specific life cycle and feeding habits that target this type of turfgrass. The larvae of the annual bluegrass weevil feed on the crown and roots of the grass, creating damage that can lead to thinning and overall decline of the turf. This pest is known to cause significant stress to Kentucky bluegrass because it's often found in areas where this grass is predominant, especially in the spring and early summer when the grass is actively growing.

The other options may affect other grass types or have different impacts on Kentucky bluegrass. While white grubs can damage various turfgrasses by feeding on roots, they are not as specialized for Kentucky bluegrass as the annual bluegrass weevil. Chinch bugs are more notorious for their effects on warm-season grasses, mainly affecting zoysia and bermudagrass. Root weevils can cause issues in some turfgrass types, but they primarily target broadleaf plants and ornamental species rather than being specifically harmful to Kentucky bluegrass.