Which signal word indicates a pesticide is highly toxic?

The signal word that indicates a pesticide is highly toxic is "Danger." This term is used on pesticide labels to communicate a significant risk associated with the product, particularly highlighting that it can cause severe injury or death if ingested, inhaled, or absorbed through the skin. The usage of "Danger" is typically reserved for substances that present the highest level of hazard, thereby alerting users to take extreme precaution when handling, applying, or storing the pesticide.

Other signal words, such as "Caution" and "Warning," indicate lower levels of toxicity and required care. "Caution" signifies that the pesticide poses less risk and is generally used for products that have a moderate risk of harm. "Warning" denotes that the pesticide has a relatively higher risk than "Caution," but still does not reach the extreme toxicity level indicated by "Danger." Therefore, "Danger" effectively conveys the urgency and seriousness associated with highly toxic pesticides, making it crucial for safety and risk management in pest control.