What components make up an emulsifiable concentrate (EC)?

An emulsifiable concentrate (EC) is specifically designed to contain a combination of an active ingredient, a petroleum solvent, and an emulsifier. The active ingredient is the chemical that provides the pest control effect, while the petroleum solvent serves as a carrier that dissolves the active ingredient and aids in its application. The emulsifier plays a crucial role by enabling the formulation to mix with water, creating a stable emulsion when the product is diluted. This stabilization is essential for the proper performance of the product in controlling pests.

The other options do not represent the correct composition of an emulsifiable concentrate. For instance, while active ingredients and water are involved in some formulations, they do not alone constitute an EC, as no solvent or emulsifier is mentioned. Similarly, the inclusion of just a thickening agent or vinegar does not align with the standard formulation of an EC, which requires specific solvents and emulsifiers to function effectively during application. Thus, the formulation indicated in the correct answer accurately reflects the components necessary for an emulsifiable concentrate suitable for pest control.