Which of the following best describes the content of fumigants?

Fumigants are best described as gases and vapors because their primary function is to penetrate spaces and materials in a gaseous form to effectively control pests. Unlike liquid pesticides, which are applied in a specific form and require absorption by the target, or solid formulations like dust and powders that sit on surfaces, fumigants disperse as gases or vapors that can diffuse into areas where pests may reside, providing a more thorough treatment, including within porous materials or enclosed environments. This unique property allows them to target a wide range of pests, including insects and rodents, even in hard-to-reach locations. Understanding this distinction is vital for recognizing the effective use and safety protocols associated with fumigant applications.