What do the signal words "Caution," "Warning," and "Danger" indicate?

The signal words "Caution," "Warning," and "Danger" are specifically designed to indicate the toxicity level of pesticides. Each term corresponds to a different degree of hazard associated with the product. "Caution" is used for substances that are considered to be relatively low in toxicity, posing minimal risk to human health and the environment. "Warning" indicates a moderate level of toxicity, suggesting that exposure could be harmful if not managed properly. "Danger," on the other hand, is reserved for highly toxic chemicals that can cause severe health effects or be lethal even with minimal exposure.

Understanding these signal words is critical for ensuring safe handling, storage, and application of pesticides, as they provide essential information for users regarding the level of caution required when dealing with these substances. This knowledge helps to protect both the applicator and the environment from potential harm.

The other options are not directly related to the indication of toxicity. The shelf life of a product pertains to its longevity and usability over time, while environmental risk levels involve potential effects on ecological systems rather than human health. Recommended application rates focus on how much pesticide to use, which is a separate consideration from the inherent toxicity of the product itself.