When should a pesticide applicator consider retesting a product's effectiveness?

Considering retesting a pesticide's effectiveness when efficacy issues arise is essential for ensuring successful pest management. If a pesticide is not performing as expected—whether due to resistance development, changed environmental conditions, or other factors—it's crucial for the applicator to assess the situation. This can involve re-evaluating the pesticide's formulation, application method, or timing. Addressing any efficacy issues promptly can help prevent continued pest damage and ensure that the chosen pest control methods remain effective.

Retesting in response to specific concerns about effectiveness allows applicators to make informed decisions about whether to continue using the product, switch to an alternative, or implement other strategies to manage the pest population effectively.