Which liquid pesticide formulation may contain close to 100% active ingredient?

The correct answer, ultra low volume (ULV), is significant in pest control applications due to its formulation that allows for a high concentration of active ingredient, often approaching 100%. ULV products are designed to be applied at very low volumes, which maximizes the efficiency of the active ingredient in controlling pests. This formulation is especially beneficial in situations where a powerful and immediate effect is required, as it minimizes the dilution that typically occurs in other pesticide formulations.

In contrast, emulsifiable concentrates generally contain a lower percentage of active ingredient due to the presence of emulsifiers and solvents that help in mixing the pesticide with water. Ready-to-use low concentrates are formulated for immediate application, which means they contain a greater proportion of water or other inert ingredients compared to the active ingredient. Aerosols also contain a blend of active ingredients with propellants and carriers that dilute the concentration, making them unsuitable for achieving close to 100% active ingredient content. Thus, ULV formulations are distinct for delivering a high potency of the active ingredient effectively for pest control purposes.