What document must be displayed at the work site when field workers are in a pesticide-treated field?

The correct answer to the question is the complete PSIS leaflet A-9, which specifically pertains to pesticide safety information. This document is a crucial part of the California Department of Pesticide Regulation’s requirements for ensuring that field workers are informed about the pesticide applications and the safety precautions they need to take while working in treated fields.

The PSIS (Pesticide Safety Information Series) leaflet A-9 provides key information about the specific pesticide being used, possible hazards, and necessary safety measures. Displaying this leaflet at the work site helps to ensure that all employees are aware of the potential risks associated with pesticide applications and understand how to protect themselves properly.

In contrast, other options do not serve the same immediate purpose during field operations. The pesticide application record is a documentation tool that logs details of the pesticide application but is not meant for employee reference on-site. The employee safety manual contains general safety practices but may not address the specific situation of working in a treated area. The emergency response plan outlines procedures in case of an incident but lacks the targeted safety information related to the pesticide that workers need at the moment they are in the field.