Which type of seed requires labeling by law?

The correct answer indicates that treated seed requires labeling by law. Treated seed refers to seeds that have undergone a specific treatment, such as the application of pesticides or fungicides, to protect them from pests and diseases during germination. This labeling is mandated to ensure that the user is informed about the treatment, which is crucial for safety and environmental reason. When seeds are treated, they can pose certain risks to both human health and the ecosystem if proper handling instructions are not followed. Therefore, accurate labeling provides essential information about the treatment used, any precautions that need to be taken, and guidelines for safe use.

While certified seed, foundation seed, and breeder seed are important classifications in seed production, they are not legally required to carry the same level of labeling specific to the treatment process. Certified seed refers to seeds that have been inspected and meet certain quality standards, while foundation and breeder seeds represent earlier stages in seed development and breeding programs.