Which term describes a herbicide applied after the crop or weed has emerged?

Which term describes a herbicide applied after the crop or weed has emerged?

• A. Pre-emergence
• B. Post-emergence
• C. Post-harvest
• D. Residual

Answer: (B)

Applying a herbicide after emergence is described as post-emergence. This timing means the weed or crop is already visible above ground, and the chemical is taken up by the plant to control or kill it at that stage. Pre-emergence, by contrast, is applied to the soil before seeds germinate to prevent emergence. Post-harvest refers to products used after harvest, which is a different context, and residual describes how long the chemical remains in the soil rather than when it’s applied. So, when the herbicide is used after the plants have come up, the term that fits is post-emergence.

Applying a herbicide after emergence is described as post-emergence. This timing means the weed or crop is already visible above ground, and the chemical is taken up by the plant to control or kill it at that stage. Pre-emergence, by contrast, is applied to the soil before seeds germinate to prevent emergence. Post-harvest refers to products used after harvest, which is a different context, and residual describes how long the chemical remains in the soil rather than when it’s applied. So, when the herbicide is used after the plants have come up, the term that fits is post-emergence.