Associate Certified Entomologist (ACE) Practice Exam

What is the function of periodic agitation in emulsifiable concentrates (EC)?

1. To promote the formation of solid particles

2. To ensure uniform mixing of the product

3. To reduce the viscosity of the liquid

4. To improve the shelf life of the formulation

The correct answer is: To ensure uniform mixing of the product

Periodic agitation in emulsifiable concentrates (EC) is crucial for ensuring uniform mixing of the product. EC formulations consist of active ingredients that need to be suspended evenly in a liquid carrier. If not adequately mixed, the active ingredients can settle at the bottom, leading to inconsistent application and effectiveness when the product is used. Agitation helps distribute these ingredients throughout the formulation, resulting in a homogeneous mixture that maintains its efficacy when diluted for application. Regular stirring or shaking helps keep the emulsion stable and ensures that each application delivers the correct amount of active ingredient. Options discussing the formation of solid particles, reduction of viscosity, or improvement of shelf life do not accurately reflect the primary purpose of periodic agitation in this context, which is to maintain uniformity and stability in the emulsion.