Which type of pesticide can only be purchased or used by certified individuals?

Restricted-use pesticides are classified as such because they pose a higher risk to human health and the environment compared to general use pesticides. As a precaution, the purchase and usage of these pesticides are limited to certified individuals who have received appropriate training and education about their safe and effective application. This certification process ensures that users understand the potential hazards, proper application methods, and regulations governing these powerful substances, thereby minimizing risks associated with misuse.

In contrast, general use pesticides can be purchased and used by anyone without certification, as they are deemed safe for public use when applied according to label instructions. Additives for enhancing pesticide effectiveness and organic pesticides also fall outside the restrictions that apply to restricted-use pesticides, allowing for broader access and use. This distinction is crucial for protecting public health and the environment while allowing sufficient oversight and knowledge for those handling more dangerous substances.