During which phase of their jobs do pesticide handlers come in direct contact with pesticide formulations of the highest concentration?

Pesticide handlers come in direct contact with pesticide formulations of the highest concentration during the mixing phase. This is primarily because mixing involves combining concentrated formulations with other materials, such as water or other pesticides, to create the solution that will be applied during the pest control process. At this stage, handlers often deal with undiluted pesticides, which can pose significant risks if proper safety measures are not adhered to.

During application, while there is certainly contact with pesticides, it typically occurs in a diluted form already prepared from the mixing process. Transporting pesticides may involve handling containers, but the pesticides are generally sealed and not in direct contact with the handler. Storage also presents minimal direct contact, as pesticides are usually stored in their original, sealed containers until needed. Therefore, the mixing stage is crucial for safety training and protective measures required for handlers due to the high concentration of the chemicals involved at that point.