Which of the following is NOT a key part of a pesticide label?

The correct answer highlights that the manufacturer's address is not considered a key part of a pesticide label. While it is indeed important for providing information about the product and for customer support, the essential components that contain critical safety and usage information are typically the ingredient statement, directions for use, and the signal word.

The ingredient statement lists the active and inert ingredients to inform the user about the chemical makeup of the pesticide. Directions for use provide explicit instructions on how to apply the pesticide safely and effectively, ensuring compliance with regulatory requirements and promoting safe use. The signal word informs users about the level of toxicity of the product, further contributing to safety awareness.

Though the manufacturer’s address may be included on the label for consumer inquiries and regulatory purposes, it does not play a direct role in the safe and effective usage of the pesticide, which is why it is not classified as a key element of the label in the context of pesticide application and safety.