Commodity Fumigation License Practice Exam

What can happen if multiple gases are present when utilizing a canister?

1. It prevents leakage

2. It extends the canister's safety duration

3. It may affect the canister's efficacy

4. It has no significant impact

The correct answer is: It may affect the canister's efficacy

When multiple gases are present during the use of a canister, it can potentially affect the canister's efficacy. Each gas may interact differently with the materials being fumigated, or even with each other, which can lead to reduced performance in terms of pest control. The chemical properties of different gases may compete, leading to altered concentrations and distribution of the active ingredients. For effective fumigation, it is crucial that the atmosphere within the sealed environment reaches the correct concentration of the intended gas, as this concentration is often determined based on specific target organisms. Any interference from additional gases can prevent the fumigant from achieving its desired lethal effects on pests. Therefore, understanding the interactions of various gases is essential to ensure that the fumigation process is effective and safe.