What can excessive ventilation during fumigation lead to?

Excessive ventilation during fumigation can lead to the escape of fumigants, which reduces their effectiveness. Fumigants are designed to penetrate and control pests in an enclosed space. When ventilation is increased beyond optimal levels, it may result in the fumigant dispersing too quickly or being diluted, thereby diminishing the concentration needed to ensure the pests are effectively controlled. Maintaining a suitable balance of ventilation is crucial; it allows for the necessary gas concentration to remain within the target area long enough for it to act on the pests while also ensuring safety once the fumigation process is complete.

Higher concentrations of gas are not typically a result of excessive ventilation, as ventilation generally dilutes gas concentration. Similarly, improved safety for workers, while important, is related to proper ventilation management rather than excessive amounts. The effectiveness of fumigants is maximized with controlled ventilation, making this answer particularly significant in practices involving non-soil fumigation.