What is a requirement when there is resistance in mosquito populations to some control materials?

When resistance in mosquito populations to certain control materials is identified, it is crucial to follow specific testing protocols to accurately assess the extent of resistance and to determine the efficacy of alternative control methods. Proper testing protocols are designed to measure resistance levels reliably, ensuring that the control strategies employed are both effective and safe for the environment and public health. This requirement emphasizes the scientific approach needed to adapt pest management techniques when resistance mechanisms arise, allowing for informed decisions on how best to manage mosquito populations.

The other options do not align with established practices for handling resistance. For example, while resistance may occur in various areas, stating it has never been detected in Michigan does not acknowledge the potential for resistance to develop. Not conducting any control efforts for a period of two years fails to recognize the need for ongoing management to protect public health. Similarly, addressing resistance solely through environmental changes may not be sufficient without data-driven strategies derived from specific testing protocols. Therefore, relying on specific testing ensures an effective response to resistance challenges in mosquito control efforts.