Which agent is commonly used for the control of annual weeds?

The choice of 2,4-D as a control agent for annual weeds is due to its broad-spectrum herbicidal properties that specifically target a wide variety of broadleaf weeds while having minimal impact on grasses. 2,4-D is a systemic herbicide that acts by mimicking natural plant hormones, leading to uncontrolled growth and ultimately the death of susceptible plants. This makes it particularly effective in agricultural settings and on turf where it is necessary to manage unwanted broadleaf species without harming established grass.

In contrast, glyphosate is a non-selective herbicide that kills most plants, including grasses, making it less suitable when the goal is to control specific annual weeds without damaging desirable plants. Triclopyr primarily targets woody plants and certain perennial broadleaf weeds, which means it is not the best choice for annual weed control. Dicamba is also a broadleaf-targeting herbicide, but it is typically used in specific situations where more aggressive control of particular species is necessary, and its potential for volatility can lead to issues in neighboring plants. Thus, 2,4-D remains the preferred option for managing annual weeds effectively.