Which statement best describes the purpose of buffer zones around water bodies?

• A. They support irrigation efficiency near water bodies.
• B. To protect water quality and aquatic life by limiting pesticide entry through drift or runoff.
• C. They are primarily for aesthetic purposes.
• D. They have no measurable effect on pesticide fate.

Answer: (B)

Buffer zones function as vegetated filters along water bodies. Their purpose is to protect water quality and aquatic life by reducing the entry of pesticides through spray drift and surface runoff. The vegetation acts like a barrier that intercepts droplets and spray that would otherwise reach the water, slows or redirects runoff so pesticides have a chance to settle or degrade, and can physically trap some residues before they reach the aquatic ecosystem. This helps minimize exposure of fish, invertebrates, and other aquatic life, and supports cleaner water supplies. It’s not about irrigation efficiency or aesthetics, and these zones do have a real, measurable effect on where pesticides end up.