Which of the following best describes the core duties of a QS during an onsite pesticide application?

• A. Ensure label compliance; supervise applicators; calibrate equipment; enforce PPE and safety; maintain records; and implement drift and environmental protections.
• B. Only supervise applicators and keep records.
• C. Monitor inventory and deliveries.
• D. Complete training and certification paperwork only.

Answer: (B)

On site, the key responsibility of a Qualified Supervisor is to oversee the applicators and keep a complete record of the activity. Supervising means ensuring that the people applying the pesticide are properly trained, follow the label directions, and work safely under the supervisor’s oversight. Keeping records provides a traceable account of what was applied, at what rate, by whom, and under what conditions, which is essential for regulatory compliance and post-application review. While tasks like calibrating equipment, enforcing PPE, preventing drift, and maintaining safety procedures are important parts of a comprehensive program, they are supports to the core on-site duties of supervision and documentation. Therefore, describing the on-site role as supervising applicators and maintaining records best captures the essential responsibility.