Which practice is an example of a chemical weed control method?

• A. Mulching
• B. Herbicide application
• C. Hand weeding
• D. Solarization

Answer: (B)

Chemical weed control uses herbicides—chemicals applied to kill or suppress weeds. The option described involves applying a herbicide to target weeds, which is exactly how chemical control works, whether applied before weeds germinate or after they appear. This approach relies on the chemical action to disrupt weed growth or survival, differentiating it from methods that don’t use chemicals.

Mulching blocks light and moisture to smother weeds, a physical barrier rather than a chemical treatment. Hand weeding removes weeds manually, a mechanical method. Solarization uses heat from the sun, trapped under plastic, to kill weeds and seeds, which is a physical/thermal approach rather than chemical.