Which of the following is a common turf grass insect?

Grubs are a common turf grass insect because they are the larval stage of several beetle species, such as the Japanese beetle and the June beetle. These larvae typically live in the soil beneath the turf and feed on grass roots, which can lead to significant damage to lawns and golf courses. The presence of grubs can result in thinning grass, wilting, and even large patches of dead grass, making them a primary concern for turf management.

In contrast, while fleas, ticks, and ants may be present in outdoor environments, they are not specifically associated with turf grass health in the same direct way that grubs are. Fleas and ticks primarily affect pets and humans rather than turf itself, and while ants can disturb soil structure, they do not feed on grass in the same detrimental manner as grubs. Thus, grubs are recognized specifically as a damaging insect to turf grass systems.