Which formulation uses capsules for the slow release of the active ingredient?

The correct choice is encapsulated formulation, which is specifically designed to release the active ingredient slowly over time. This formulation utilizes tiny capsules that contain the pesticide, allowing for a controlled and gradual release. This slow-release mechanism enhances effectiveness by providing a longer-lasting pest control solution and reducing the risk of rapid degradation of the active ingredient.

In contrast, granular formulations typically involve solid particles that need moisture to activate; suspendable concentrates are liquid formulations that require mixing with water before application; and water-soluble packaging dissolves in water, releasing the active ingredient all at once rather than gradually. Hence, the unique property of the encapsulated formulation is its ability to manage the release rate of the active substances effectively.