Commodity Fumigation License Practice Exam

Why are tarps necessary over areas treated with gas fumigants?

1. To enhance the efficacy of the treatment

2. To prevent pests from re-entering the area

3. To reduce rapid surface volatilization of the gas

4. To keep the area insulated

The correct answer is: To reduce rapid surface volatilization of the gas

Tarps are essential over areas treated with gas fumigants primarily because they serve to reduce the rapid surface volatilization of the gas. When fumigants are applied, they need to remain in the treated space for a designated period to ensure effectiveness against pests. By covering the area with tarps, the escape of the fumigant gas into the atmosphere is minimized, allowing for a more concentrated application. This containment helps maintain the required levels of the fumigant, enhancing its ability to penetrate and eliminate the target pests effectively. This practice is critical in achieving optimal fumigation results, as the air exchange that would otherwise occur without the tarps could significantly diminish the gas concentration necessary for pest eradication. Keeping the fumigant within the treated area boosts the treatment's efficacy and protects the environment from unnecessary exposure to these chemicals.