The concentrates may approach 100% AI, remain in solution, require little agitation, and can be easily absorbed through skin; they may cause rubber hoses to deteriorate. Which formulation is this?

• A. Emulsifiable Concentrates (EC or E)
• B. Ready-to-use Low-concentrate Solutions (RTU)
• C. Ultra-low Volume (ULV)
• D. Flowables (F)/ Liquids (L)

Answer: (C)

Ultra-Low Volume formulations are designed to deliver pesticide active ingredients in extremely small spray volumes, often with concentrates that are highly concentrated—nearly all active ingredient. In this form, the concentrate can stay in solution and requires little agitation to mix, which is why it’s easy to prepare a useable product with minimal handling. The solvent-heavy nature of these formulations also means they can be readily absorbed through skin and can be aggressive toward rubber hoses, leading to deterioration.

Emulsifiable concentrates, by contrast, are designed to form emulsions when mixed with water, not stay completely in solution, and they always include solvent and emulsifier components that you must disperse rather than keep as a true solution. Ready-to-use low-concentration solutions are already diluted and not near 100% active ingredient. Flowables or liquids are suspensions or slurries, not true solutions, and they require constant agitation to keep the solid or viscous components evenly dispersed.