Which factor is not a common reason for pesticide accidents?

The factor that is not a common reason for pesticide accidents is reading and understanding pesticide labels. Pesticide labels are designed to provide essential information regarding safe handling, application rates, storage requirements, and necessary protective equipment. When users take the time to read and understand these labels, they significantly reduce the risk of accidents and misuse.

In contrast, the other options reflect common reasons for pesticide accidents. Incorrect mixing procedures can lead to toxic concentrations or ineffective applications, while improper storage may result in spills or accidental exposure. Additionally, a lack of protective gear increases the risk of personal harm during application, sending the user and others nearby into potentially dangerous situations. Therefore, reading and understanding pesticide labels is a crucial practice that enhances safety and prevents accidents.