What type of pesticide formulation is known to form poisonous gas when applied?

Fumigants are a specific class of pesticides designed to be volatile and transform into gas upon application. This gaseous state allows them to penetrate various materials, including soil and structures, effectively targeting pests that may be hidden in crevices or within the substrate itself. The gaseous nature of fumigants is what makes them particularly effective, as they can disperse throughout an area, providing thorough treatment against insects, rodents, and other pests.

The potential to form poisonous gas arises from the chemical compounds present in fumigants, which can include substances such as methyl bromide or sulfuryl fluoride. When applied, these substances vaporize and can create toxic environments for pests, making fumigants particularly powerful but also necessitating strict safety precautions to protect humans and non-target organisms from exposure.

The other pesticide formulations listed do not share this characteristic. Microencapsulated formulations involve tiny capsules that release the active ingredient over time but do not produce gas. Invert emulsions are typically liquid formulations that encapsulate pesticides within an oily phase and do not result in the release of gas upon application. Adjuvants are substances added to enhance the effectiveness of a pesticide but are not themselves pesticides, nor do they generate poisonous gases. Thus, the properties