Resistance management: which option does NOT represent a resistance management strategy?

• A. Rotating MOA
• B. Using diversified treatment approaches
• C. Relying on a single pesticide indefinitely
• D. Using integrated non-chemical controls

Answer: (C)

The main idea being tested is how to slow or prevent pest populations from becoming resistant to pesticides by varying pressure and using multiple strategies. Rotating a mode of action means switching between different chemical mechanisms so pests aren’t continuously exposed to the same effect, which slows the rise of resistance. Using diversified treatment approaches combines different chemical classes and non-chemical methods, reducing reliance on any single method and making it harder for resistance to spread. Using integrated non-chemical controls adds preventive and biological methods that lessen overall pesticide use, further lowering selection pressure and extending the effectiveness of tools you have.

Relying on a single pesticide indefinitely does the opposite: it imposes a constant, strong selective pressure that quickly rewards the few individuals in the pest population that already tolerate that pesticide, leading to rapid resistance development and loss of control.