Pesticide Safety and Handling
Exposure and protection
Know the four routes of exposure - dermal, inhalation, oral, and ocular - and that dermal absorption is the most common route for agricultural applicators. Signal words track acute toxicity: Danger/Poison (highly toxic, with skull-and-crossbones for the most toxic), Warning (moderately toxic), and Caution (slightly toxic). Personal protective equipment requirements are on the label; the label minimum is the floor, not the goal. Chemical-resistant gloves, coveralls, eye protection, and footwear are common; respirators require fit testing and medical clearance.
Handling and spill response
Read the label before opening. Mix and load in a well-ventilated area, preferably outdoors or with ventilation, and stay upwind. Never eat, drink, or smoke while handling. Prevent back-siphoning by keeping the fill hose above the water line or using an air gap. For spills: protect yourself, contain the material, absorb it, and dispose per label and state rules. Triple-rinse empty containers (or pressure-rinse) and dispose through the state container-recycling program; never burn or reuse pesticide containers.
Traps in questions
- Signal word vs. hazard. A "Caution" product is still hazardous; low acute toxicity does not mean safe.
- Gloves are not universal. Some labels require specific glove materials; latex is often inadequate.
- First aid on the label outranks instinct - follow label directions and call the poison control center or emergency number.
- Do not induce vomiting unless the label directs it.
Rule of thumb
PPE comes off last, after the equipment is clean and the product is secured. Wash gloves before removal, remove PPE without touching contaminated outer surfaces, and shower promptly.