Which type of pesticide can control pests for extended periods, from weeks to years?

Residual pesticides are designed to remain active in the environment for an extended duration, offering long-term control of pests. They work by adhering to surfaces where they are applied, providing ongoing efficacy against target pests over time. This can range from several weeks to even years, depending on the specific pesticide formulation and environmental conditions.

In contrast, systemic pesticides are absorbed by plants and provide protection by targeting pests that feed on those plants, but they do not provide long-lasting effects in the surrounding environment. Contact pesticides act quickly upon application and rely on direct contact with pests for effectiveness, but they typically do not have any residual action once they degrade. Organic pesticides, while often considered less harmful to non-target organisms and the environment, also do not inherently possess the long-lasting properties that residual pesticides have. Therefore, for prolonged pest management, residual pesticides are the preferred choice.