In which scenario is spot fumigation most effective?

Spot fumigation is most effective when there are only specific areas showing pest activity because it allows for a targeted approach. This method focuses on the locations where pests are identified, minimizing the need for extensive treatment of areas that are not affected. By concentrating on the problem spots, spot fumigation can efficiently eliminate the pests while reducing the potential for unnecessary chemical application, thus being more economical and environmentally friendly.

In contrast, if the entire area has pests, a broader fumigation approach would be required to ensure all affected zones are treated effectively. Rainy weather may also hinder the effectiveness of fumigation, as moisture can affect the distribution and potency of fumigants. Similarly, when dealing with an infestation across multiple rooms, a more comprehensive fumigation strategy would be needed to address the widespread problem, rather than simply treating spot areas.