What personal safety measure should be taken when applying rotenone in powder form?

When applying rotenone in powder form, using a proper respirator mask is imperative for personal safety. Rotenone can be harmful if inhaled, as it can irritate the respiratory system and cause more serious health issues. A proper respirator mask is designed to filter out harmful particles from the air, thereby significantly reducing the risk of inhalation exposure to toxic substances.

Unlike a standard face mask, which may not provide adequate protection against fine particles or chemicals, a respirator is specifically designed to protect the wearer against inhalation of hazardous substances. Consequently, this choice is crucial in ensuring the safety of the person applying the herbicide in order to maintain a safe working environment.