What is a key factor to check before starting fumigation?

Before starting fumigation, ensuring that all potential escape routes are sealed properly is crucial. This step is essential to prevent the escape of the fumigant, which can pose risks to human health, non-target animals, and the environment. Proper sealing helps maintain the efficacy of the fumigation process by allowing the fumigant to be contained in the area where it is applied, ensuring that pests are effectively eradicated.

Other options, while important in different contexts, do not hold the same critical significance as sealing escape routes. For instance, checking the weather forecast can help avoid interruptions due to environmental factors, but it does not directly impact the safety and success of the fumigation itself. The experience level of the technician is important for ensuring proper application techniques and safety protocols, but it does not address the immediate risks associated with unsealed areas. Local authority approval is also necessary for regulatory compliance and safety, but the immediate concern of containment must be prioritized.