Answer: Kerala
Notes: Kerala conducted India’s first science-based, community-driven eradication of Senna spectabilis in Wayanad Wildlife Sanctuary. Senna spectabilis is an invasive species native to American tropics. The tree grows 7–18 metres tall with a dense, spreading crown. It forms dense, sterile thickets, choking native plants, altering soil chemistry, and reducing food for herbivores. It closely resembles Kerala’s state flower Cassia fistula (kanikkonna), which aided its initial planting. The eradication involved community participation and science-based methods to restore forest ecosystems and promote biodiversity recovery.
