What does Quinclorac primarily control in turfgrass?

Quinclorac is an herbicide known for its selective control of specific types of weeds, particularly in turfgrass settings. This chemical is primarily effective against annual grasses, which include weeds like crabgrass. It also targets certain annual broadleaf weeds, providing a degree of control over unwanted plants in various turf situations.

The choice of annual grasses and some annual broadleaf weeds as the primary targets of Quinclorac aligns with the herbicide's mode of action, which is designed to interrupt the growth of these plant types effectively. In contrast, Quinclorac is not primarily focused on controlling perennial grasses or a broad spectrum of broadleaf weeds, nor is it utilized for managing insect pests or soil-borne diseases, which is why the other options do not represent the accurate scope of what Quinclorac controls. Therefore, identifying annual grasses and some annual broadleaf weeds as the main targets encapsulates Quinclorac's utility in turfgrass management.