Pesticide Safety and Handling
Core concepts
Pesticide safety begins with the label and the Safety Data Sheet, but the exam tests whether you can apply them under pressure. Know the routes of exposure (dermal, inhalation, oral, ocular) and that dermal absorption is the most common route for applicators. Understand the difference between acute toxicity (single exposure, LD50/LC50, Signal Words DANGER/WARNING/CAUTION) and chronic toxicity (long-term effects such as carcinogenicity or reproductive harm). Master personal protective equipment (PPE): coveralls, chemical-resistant gloves, boots, eye protection, and respirators, and know that chemical-resistant is not the same as waterproof. Review the medical surveillance and decontamination procedures, the three C's of poisoning (clean, change, call), and the difference between an emergency and a routine exposure.
Traps to expect
Questions often swap "waterproof" for "chemical-resistant," or ask which PPE the label requires rather than what feels comfortable. Signal words are frequently tested: DANGER means high toxicity, WARNING moderate, CAUTION low, and the word POISON accompanies DANGER on highly toxic products. Don't confuse toxicity with hazard: a low-toxicity product can still be hazardous if mishandled. Watch for questions that imply a respirator cartridge lasts forever - it doesn't; change it per label or when breakthrough occurs.
Worked example / rule of thumb
Rule of thumb: if the label says "chemical-resistant gloves," leather or cloth gloves are never acceptable, and gloves must be rinsed before removal. For a spill on skin, remove contaminated clothing, wash with soap and water for at least 15 minutes, and call the number on the label. Remember: the label is the law - when in doubt, follow the most protective instruction.