Final answer:
The Worker Protection Standard is the federal regulation that mandates employee training in the use of pesticides as part of the EPA's agricultural worker safety efforts.
Step-by-step explanation:
The federal regulation that requires employee training in the use of pesticides is the Worker Protection Standard (WPS). This regulation is part of the Environmental Protection Agency's (EPA) effort to protect the health of workers in agricultural settings. The WPS mandates that employers provide training, protective equipment, and information regarding pesticide safety to their workers. This training is essential to ensure that workers are aware of the potential hazards associated with pesticide use and can take appropriate precautions to protect themselves and the environment from exposure. It is also important to note the role of the Occupational Safety and Health Administration (OSHA), which issues workplace health and safety regulations that cover a wide array of hazards, including chemical exposure such as pesticides.