Which non-soil fumigant is typically regulated as a restricted material?

The correct answer is that all of the listed non-soil fumigants—chloropicrin, methyl bromide, and sulfuryl fluoride—are typically regulated as restricted materials. Restricted materials are those that pose a significant risk to human health and the environment, necessitating additional precautions and regulations for their use.

Chloropicrin, commonly used in soil pest management, is restricted due to its toxic properties and potential health risks. Methyl bromide, known for its effectiveness in pest control, is highly regulated due to its ozone-depleting characteristics and associated environmental impact. Sulfuryl fluoride, another fumigant option, is regulated because of its toxicity and potential for harm to humans and animals if not used correctly.

Since all three of these fumigants have inherent risks that warrant oversight, they are categorized as restricted materials to ensure that applicators are adequately trained and that proper safety measures are in place during application. This regulation is crucial for protecting both the applicators and the surrounding environment from the potential hazards associated with these chemicals.