What type of pesticide formulation consists of a liquid dispersed as droplets in another liquid and may require agitation?

• A. Emulsion
• B. Suspension
• C. Solution
• D. Granular

Answer: (A)

Emulsions are liquid-liquid dispersions, where droplets of one liquid are spread throughout another. In pesticide products this shows up as droplets of an active liquid dispersed in a carrier liquid, often stabilized by emulsifiers. When you mix such a product with water, it forms a uniform mixture of tiny droplets that need agitation to stay evenly dispersed and to prevent the droplets from coalescing and separating. This is why emulsions may require shaking or stirring during preparation and application. In contrast, suspensions have solid particles dispersed in a liquid and tend to settle without agitation; solutions have a substance dissolved completely with no droplets; and granular formulations are dry solids.