Employers must maintain employee-handler use records that identify the employee, the name of the pesticide, and the date of handling for which of the following scenarios?

Employers are required to maintain employee-handler use records for situations that involve specific types of pesticides and their associated risks. In this scenario, the correct answer pertains to a pesticide containing an organophosphate compound, which is known for its toxic properties. The designation of the signal word "DANGER" or "WARNING" indicates a higher level of concern regarding its potential health effects.

In the context of agricultural practices, especially in research production of agricultural plant commodities, thorough records are essential for ensuring safety and regulatory compliance. Documentation of who handles these pesticides, alongside details such as the date and the specific pesticide involved, is crucial for tracking exposure and assessing any potential health risks to the employee-handler as well as adhering to pesticide regulations. These records facilitate proper monitoring and management of pesticide use, contributing to worker safety and environmental protection.

The emphasis on both the chemical composition (organophosphate) and the scenario of its usage (research production) highlights the heightened need for oversight in environments where the risk of exposure is higher, thus reinforcing the necessity for accurate record-keeping in these cases.