Texas Pesticide Applicator Practice Exam

Which formulation is known for being highly concentrated and easily absorbed through the skin?

1. Fumigant

2. Flowable

3. Emulsifiable concentrate

4. Aerosol

The correct answer is: Emulsifiable concentrate

Emulsifiable concentrates are known for being highly concentrated formulations that can be easily absorbed through the skin. This formulation is composed of active ingredients mixed with emulsifiers, allowing it to be diluted in water while maintaining stability. The small particle size of emulsifiable concentrates facilitates their absorption through biological membranes, making them particularly effective for certain application methods. In practice, handlers must be cautious when using emulsifiable concentrates because of their potential for skin absorption, which can pose a risk during application. The concentration of active ingredients in these formulations is typically higher compared to other types, which further emphasizes the importance of protective measures. Fumigants, on the other hand, are gases or volatile substances used to control pests in enclosed spaces and do not fit the description of a formulation that is typically absorbed through the skin. Flowables are formulated as suspensions and are less concentrated than emulsifiable concentrates, while aerosols are designed for easy application but contain lower concentrations of active ingredients and are not primarily absorbed through the skin. Each of these alternative formulations serves a different purpose in pest control, underscoring the unique characteristics of emulsifiable concentrates.