Virginia Commercial Pesticide Applicators CORE Exam

Which formulation is known for not clogging hoses or nozzles?

1. Wettable powders

2. Concentrate solution

3. Dust formulations

4. Pellet formulations

The correct answer is: Concentrate solution

Concentrate solutions are specifically designed to be liquid and typically have a low viscosity, which helps them to flow smoothly through application equipment. This property minimizes the likelihood of clogging hoses or nozzles since the formulation can easily pass through narrow openings without leaving residues that could lead to blockages. Liquid formulations allow for better mixing and dilution compared to solids, and they tend to stay suspended in liquid, ensuring consistent delivery of the pesticide. In contrast, wettable powders can create suspensions that may settle and lead to clogs if not agitated properly. Dust formulations, while effective for certain applications, can be prone to lumping and may require specific handling to avoid clogging due to their particulate nature. Similarly, pellet formulations are solid and often larger than other particles, which increases the risk of clogging in application equipment. Together, these characteristics highlight why concentrate solutions are preferred when minimizing the risk of clogs in the spray equipment.