What describes a pesticide that remains effective for an extended period after application?

A pesticide that remains effective for an extended period after application is classified as a residual pesticide. This type of pesticide has the properties that allow it to persist in the environment or on surfaces, continuing to provide control against pests well after its initial application. Residual pesticides are beneficial when continuous protection is needed, as they can target pests over a longer duration, reducing the frequency of reapplications and providing sustained effectiveness against pest populations.

In contrast, non-residual pesticides typically break down quickly and do not provide lasting effects, making them suitable for immediate needs but not for long-term pest control. Temporary and short-term pesticides imply a limited duration of effectiveness, similar to non-residual options, and would not be appropriate descriptions for a pesticide that maintains its efficacy over time. These distinctions underscore the importance of selecting the right type of pesticide based on the specific pest management needs.