What does the term "Danger-poison" refer to on pesticide labels?

The term "Danger-poison" on pesticide labels specifically designates very highly toxic pesticides, indicating a significant risk to human health if exposure occurs. This label serves to alert handlers and users of the extreme precautions that must be taken when handling or applying these substances. The use of "Danger" signifies that the product can cause acute effects or be lethal if ingested, inhaled, or absorbed through the skin. Additionally, the term "poison" implies that the pesticide can cause harm or fatalities, underscoring the need for strict adherence to safety protocols during its use.

The other choices discuss designations for different types or levels of toxicity but do not accurately reflect the specific, severe caution implied by the "Danger-poison" label. It's important for handlers to understand the implications of this label to handle such pesticides safely and responsibly, protecting both themselves and the environment.