Which statement best defines a residue in the context of pesticides?

• A. It refers to a pesticide that can cause harm over an extended period
• B. It refers to the price of the pesticide
• C. It refers to the brand name of the pesticide
• D. It refers to the application rate of the pesticide

Answer: (A)

Residue in pesticides refers to the portion of the pesticide that remains on crops, soil, water, or other surfaces after application. It represents what could persist and potentially cause exposure later, which is why the idea of harm over an extended period fits best: residues can remain and contribute to chronic exposure risks. The other options describe price, brand, or how much was applied—not what stays behind after use. In practice, safety standards set maximum residue limits to guard against these lingering amounts, and farmers manage residues by applying pesticides correctly and observing pre-harvest intervals.