Which method is used to manage severe pest infestations effectively?

Fumigation with gaseous pesticides is an effective method for managing severe pest infestations because it allows for comprehensive coverage of the area being treated. This technique involves releasing a pesticide in the form of gas, which penetrates the infested environments thoroughly, reaching pests that are hidden in cracks, crevices, or within materials that might be difficult to treat with other methods. Fumigation is particularly beneficial for large-scale infestations where localized treatments would not sufficiently eliminate the problem.

In contrast, regular spraying of garden plants can be less effective for severe infestations, as it may not reach all the affected areas or pests that are concealed. Hand-picking pests is a labor-intensive method that works best for small infestations and may not be practical for severe cases. Natural remedies, while often safer for the environment, might lack the potency or effectiveness needed to address a severe pest problem compared to chemical treatments. Therefore, fumigation stands out as a robust solution for tackling significant pest issues.