Soluble pesticides are less likely to move with water in surface runoff.

• A. True
• B. False
• C. It depends
• D. Not applicable.

Answer: (B)

Mobility with runoff is largely controlled by how soluble the pesticide is in water. When a pesticide is highly soluble, it dissolves in the water running off the field and is carried away with that water, increasing its transport to surface water. In contrast, pesticides that don’t dissolve easily tend to stay attached to soil particles and are less likely to move with runoff. So the statement that soluble pesticides are less likely to move with water in surface runoff doesn’t hold; it’s the opposite. Keep in mind that other factors like soil type, organic matter, rainfall intensity, and degradation also influence transport, but the core idea is that higher solubility generally means greater mobility in runoff.