Drawdown is most effective in winter because it exposes aquatic plants to freezing temperatures. Is this statement true or false?

• A. True
• B. False
• C. It is more effective in summer
• D. Not effective in either season

Answer: (A)

Drawdown kills or weakens aquatic plants by lowering water depth so they are exposed to air and environmental stress. In winter, that exposure includes freezing temperatures, which injure plant tissues, disrupt cell structure, and hinder water and nutrient transport. Ice formation inside stems and rhizomes compounds the damage, and cold, dry air plus wind dry out exposed surfaces, making recovery less likely. Because these freezing injuries are most pronounced when water is shallow and temperatures are low, winter provides the conditions where drawdown is most effective. While some plants may persist or regrow from seeds or durable rhizomes, the overall kill potential is highest in cold weather. Therefore, the statement is true.