What type of formulation is known for having a long residual effect once activated?

Granules are a type of pesticide formulation that is particularly recognized for its long residual effect after being activated. This characteristic comes from the physical structure and composition of granules, which are typically larger particles that can remain in the environment for an extended period. When granules are applied to soil or vegetation, they often dissolve or release their active ingredients slowly over time.

This slow release results in prolonged effectiveness against targeted pests, making granules a preferred choice for applications requiring lasting control. Granules are especially useful in managing pests that reside in soil, as they can be incorporated into the ground or applied to the surface, allowing for extended interaction with the target pests as the granules dissolve and release their active ingredients.

In contrast, other formulations such as dusts may also have residual properties, but they can be more susceptible to environmental factors like wind or moisture, which can limit their persistence. Liquids can provide quick action but typically do not have the same longevity as granules. Pellets, while similarly effective in certain situations, do not generally offer the same extended residual effect and are used more for specific applications.