What signal word must be on the label for pesticides classified as "relatively non-toxic"?

The signal word on the label for pesticides classified as "relatively non-toxic" is "CAUTION!" This classification indicates that these pesticides pose a minimal risk to human health and the environment relative to other classes of pesticides.

The use of "CAUTION!" helps to inform users that while the product is relatively safer, it still requires careful handling and application practices. Pesticides with the "CAUTION!" signal word are typically subject to fewer restrictions than those labeled with stronger warnings, but it is essential for users to remain aware and take appropriate safety precautions.

In contrast, the other signal words all denote higher levels of toxicity and risk. "WARNING!" suggests moderate toxicity, while "DANGER!" indicates a high degree of toxicity and requires more stringent handling and safety measures. "HAZARD!" is not a standard signal word in this context, thus reinforcing that "CAUTION!" is the correct term for pesticides with lower toxicity classification.