Which formulation of insecticide is usually applied without further dilution?

Granules are typically applied without the need for further dilution because they are formulated as solid particles that can be spread directly onto the target area. This method takes advantage of the slow release and longer residual action of granules, allowing them to be effective over time without the need for mixing with water or solvents. They are particularly useful in treating soil or areas where moisture may be limited, ensuring ease of application and reducing the risk of runoff into water sources.

In contrast, liquid concentrates often require dilution in a solvent before application to achieve the appropriate concentration for effective pest control. Emulsifiable concentrates also need to be mixed with water to form an emulsion for application, as they are designed to disperse in a liquid medium. Wettable powders are intended to be mixed with water to form a suspension for spraying, and thus, they cannot be used directly without preparation. This distinction highlights the practical consideration in choosing granules for applications where immediate use in solid form is beneficial.