Which statement about trained and certified applicators is true?

Trained and certified applicators possess the necessary qualifications and training to handle pesticides, particularly restricted use pesticides, which are regulated due to their potential risks to human health and the environment. This certification ensures that these applicators understand how to use these products safely and effectively, following all relevant guidelines and regulations.

By being certified, they are authorized to both apply these pesticides directly and supervise others in their application. This includes ensuring that safety protocols are followed and that the pesticides are used in compliance with legal requirements. The ability to apply and supervise reflects a level of expertise and responsibility that is essential in mitigating risks associated with pesticide use.

The other options present limitations or requirements that are not accurate regarding the qualifications of trained and certified applicators. They can indeed apply restricted use pesticides, which distinguishes their role and responsibilities from those who may only handle non-restricted substances or lack certification altogether.