What is the appropriate method to control box elder bugs found inside a structure?

The most appropriate method to control box elder bugs found inside a structure involves removing them with a vacuum. This method is effective because it physically eliminates the pests from the environment without the use of chemicals, which can be beneficial in maintaining indoor air quality and minimizing any chemical exposure for inhabitants, particularly those with sensitivities.

Vacuuming allows for immediate removal, and the pests can be disposed of easily. It's essential to ensure that the vacuum is fitted with a bag or filter that can contain the bugs effectively to prevent them from re-entering the living space. This method is also practical because it does not require waiting for treatments to take effect, as would be the case with chemical sprays.

While sealing all entry points is a good long-term preventative strategy, it does not address current infestations already within the structure. Leaving the bugs alone is not advisable, as even though they do not cause direct harm, their presence can be a nuisance. Chemical sprays could provide a solution, but they may introduce other concerns related to toxicity and environmental impact. Thus, vacuuming stands out as the most appropriate immediate control method.