What is a common disadvantage of using Emulsifiable Concentrate (EC) and Ultra-low Volume (ULV) formulations?

The disadvantage of requiring constant agitation to keep in suspension is a key characteristic of Emulsifiable Concentrate (EC) and Ultra-low Volume (ULV) formulations. These types of formulations are designed to deliver high concentrations of active ingredients, which can lead to separation if not agitated properly.

When left undisturbed, the components in these formulations can settle or separate, which undermines their effectiveness when applied. The necessity for constant agitation ensures that the active ingredients remain well mixed, allowing for uniform application and maximizing the efficacy of the product. This requirement can create challenges in application, such as the need for specialized equipment or additional labor to ensure consistent mixing.

Understanding this characteristic of EC and ULV formulations is crucial for successful pesticide application, as failure to properly mix these products can result in uneven coverage and reduced pest control effectiveness. Other options may present their own challenges, but they do not directly relate to the formulation characteristics the way constant agitation does.