What is the primary characteristic of an "Emulsifiable Concentrate" formulation?

The primary characteristic of an "Emulsifiable Concentrate" formulation is that it forms a stable emulsion when mixed with water. This type of formulation contains active ingredients, as well as emulsifiers that allow water and oil-based components to mix effectively. The ability to create a stable emulsion is critical for the delivery of pesticides, as it ensures that the active ingredients are evenly distributed and can be effectively applied to target pests.

In practice, emulsifiable concentrates are used because they can be diluted with water to create a sprayable solution, making it easier to apply pesticides in various environments. This characteristic allows for precise application and increased efficacy of the pesticide, as the emulsion helps to ensure that the product adheres to the surfaces being treated.

The other options relate to different formulations or characteristics that do not define emulsifiable concentrates. For instance, being composed of granular materials is typical of granular formulations, while a gel-like consistency does not align with how emulsifiable concentrates behave due to their liquid nature. Additionally, all emulsifiable concentrates contain active ingredients; hence the option stating they contain none is not applicable.