What signal word indicates moderate toxicity in pesticides?

The correct answer is "Warning," as this signal word specifically indicates moderate toxicity in pesticides. The use of "Warning" provides critical safety information to users, alerting them that the pesticide is hazardous, but not to the extreme level that would be indicated by the signal word "Danger," which denotes high toxicity.

Understanding the categorization of signal words is essential for safe handling and application of pesticides. The word "Caution" typically suggests low toxicity, while the phrase "No signal word needed" is applicable only in instances where the product poses no significant risk. This categorization helps users experience an appropriate level of caution based on the toxicity of the product they are handling, effectively communicating the potential risks associated with its use.