Pendimethalin is a pre-emergent herbicide commonly used in agriculture to control a variety of annual grasses and broadleaf weeds. It works by inhibiting cell division in the roots of germinating plants, preventing them from growing. This makes it effective for crops like corn, soybeans, and vegetables. Pendimethalin is typically applied to the soil before weeds emerge, allowing it to create a barrier that suppresses weed growth. It is important for farmers to follow application guidelines to minimize environmental impact and ensure safety for non-target organisms, including beneficial insects and soil microbes.