Texas Pesticide Applicator Practice Exam

What distinguishes emulsifiable concentrates from flowables?

1. Emulsifiable concentrates are solids, while flowables are liquids.

2. Emulsifiable concentrates start as liquids, flowables start as solids.

3. Flowables are safer to handle than emulsifiable concentrates.

4. Flowables are only used for soil applications.

The correct answer is: Emulsifiable concentrates start as liquids, flowables start as solids.

Emulsifiable concentrates and flowables are both types of pesticide formulations, but they differ significantly in their characteristics and use. The distinction lies in the state of matter from which they derive. Emulsifiable concentrates begin as liquids that typically contain a solvent, while flowables originate from solid materials, such as wettable powders or granules, that have been mixed with sufficient liquid to create a suspension. This fundamental difference affects their handling, mixing, and application processes. Emulsifiable concentrates are designed to create stable emulsions when mixed with water, allowing for efficient dispersion of active ingredients. In contrast, flowables retain some solid characteristics, enabling them to maintain a specific texture and viscosity, making them useful for a variety of applications, including those where a solid form may be advantageous. Understanding this distinction is crucial for the effective and safe application of pesticides, as it influences the choice of formulation based on the targeted application method and the specific pest management scenario.