Which statement correctly defines a residue as a pesticide that remains active for an extended period?

• A. Refers to pesticide after it has dried up.
• B. Is a pesticide that remains active/effective for an extended period.
• C. A pesticide remaining immediately after an application.
• D. The area to be evacuated.

Answer: (B)

Residue means the portion of a pesticide that remains in the treated area and continues to be active after application, showing persistence over time. This lingering activity is what makes a residue a lasting pest-control effect, rather than something that has dried or is only present immediately after spraying. So the statement that describes a pesticide as remaining active for an extended period best captures what a residue is. The other ideas aren’t about lingering effectiveness (drying up), immediate presence right after application, or safety-zone terminology (evacuation area).