Which pesticide formulation is likely to provide lasting pest control in outdoor settings?

Granules are a solid pesticide formulation that provides a sustained release of active ingredients into the environment, making them particularly effective for lasting pest control in outdoor settings. When applied, granules can dissolve gradually due to moisture, allowing the active ingredients to persist in the soil or surrounding area for an extended period. This slow release contributes to a more prolonged effect against pests compared to other formulations.

In outdoor conditions, factors such as rain, sunlight, and temperature can affect the efficacy and longevity of pesticide applications. Granules remain stable and are less prone to being washed away or degraded quickly compared to liquid formulations. Since they target soil-dwelling pests or those that interact with the soil, their mode of action is particularly suited for outdoor environments.

Other formulations, such as aerosols, emulsifiable concentrates, and liquid solutions, tend to provide quicker knockdown effects but may not maintain the same level of control over a longer duration. Liquid formulations can evaporate and are often more susceptible to environmental degradation, while aerosols are typically designed for immediate use against visible infestations and may not provide residual protection. Hence, granules are the preferred choice for achieving enduring control outdoors.