Virginia Commercial Pesticide Applicators CORE Exam

What are fumigants primarily used for?

1. Pesticides that form explosive reactions

2. Pesticides that form poisonous gases when applied

3. Pesticides that are safe for all organisms

4. Pesticides with a low toxicity for humans

The correct answer is: Pesticides that form poisonous gases when applied

Fumigants are primarily used for their ability to penetrate spaces and release poisonous gases that effectively control pests and pathogens in a wide range of environments, such as soil, structures, and stored products. These gases can diffuse quickly and cover large areas, making fumigants particularly effective for eradicating unwanted pests like insects, rodents, and nematodes. The design of fumigants allows them to permeate into crevices and other inaccessible areas where traditional pesticides may struggle to reach. This characteristic makes them an essential tool for pest management, especially in industries such as agriculture and food storage, where rapid eradication of pests is crucial for maintaining health and safety standards. Although the safety of fumigants can vary, the focus is on their ability to create toxic environments for target organisms, hence their classification under poisonous gases. The other choices do not accurately represent the role of fumigants; fumigants are not classified for their explosive properties, are not considered safe for all organisms, and they often possess higher toxicity levels for humans compared to many other types of pesticides.