What constitutes a misbranded pesticide according to regulations?

A misbranded pesticide is defined primarily by its labeling and packaging. If a pesticide has improper labeling, it can lead to misleading information about the product's identity, usage instructions, safety, or ingredients. Proper labeling is vital not only for compliance with regulatory standards but also for ensuring that users understand how to apply the product safely and effectively.

In the context of the other options, a product containing no active ingredient could also lead to issues related to efficacy, but it is not the label that constitutes misbranding. Similarly, a pesticide not registered with local authorities pertains more to compliance and legal status than to branding itself. Lastly, branding a pesticide with any name is not inherently an issue if it is otherwise labeled correctly; misbranding focuses primarily on the accuracy and clarity of the information provided on the label. Therefore, improper labeling is the essential aspect defining a misbranded pesticide.