Which signal word indicates the highest level of toxicity on a pesticide label?

The signal word that indicates the highest level of toxicity on a pesticide label is "Danger." This term is specifically used to alert users that the product may cause severe injury or death if it is not handled correctly. Pesticides labeled with "Danger" typically pose a significant risk if ingested, inhaled, or absorbed through the skin and often contain hazardous ingredients.

In comparison, "Caution" and "Warning" are used for products with lower levels of toxicity. "Caution" suggests that the pesticide presents a relatively low risk, while "Warning" indicates a moderate level of toxicity. "Notice" is not commonly used as a signal word on pesticide labels, often seen instead as general information rather than a toxicity rating. Understanding these distinctions is essential for safe handling and application practices in pest management.