What type of herbicides are primarily root absorbed and translocated to leaves?

• A. Seedling growth inhibitors
• B. Photosynthesis inhibitors
• C. Systemic herbicides
• D. Contact herbicides

Answer: (C)

Systemic herbicides are defined by their movement inside the plant after uptake. When a herbicide is taken up through the roots and then travels to the leaves, it demonstrates systemic action, spreading throughout the plant via the vascular system so that control occurs beyond the initial contact site. This contrasts with contact herbicides, which kill only the tissue they touch and don’t move within the plant, and with seedling growth inhibitors or photosynthesis inhibitors, which may act locally or in ways that don’t emphasize root-to-leaf translocation. So the scenario of root absorption followed by movement to leaves points to systemic herbicides as the correct concept.