What is the significance of the “signal word” on a pesticide label?

The signal word on a pesticide label serves a crucial role in communicating the level of toxicity associated with the product. It provides immediate information to users about how dangerous the pesticide can be if misused or handled improperly. The signal words typically used are "Caution," "Warning," and "Danger," each corresponding to increasing levels of toxicity.

For example, "Caution" indicates a relatively lower level of toxicity, while "Danger" suggests a high level of toxicity and potential for harm. This information is vital for ensuring the safety of the user, the environment, and non-target organisms. By understanding the toxicity level indicated by the signal word, individuals can take appropriate precautions when handling, applying, or in any way interacting with the pesticide. This awareness helps in making informed decisions about safety measures, personal protective equipment, and emergency response in case of exposure.

In contrast, the other options do not correctly reflect the purpose of the signal word. The expiration date, application methods, or chemical composition are communicated through other sections of the pesticide label but are not directly represented by the signal word.