Category: Greening Sanjeevi Hills

Prosopis juliflora, commonly known as Vilayati Karuvelam, is an exotic species introduced to India in the late 19th century from Central and South America for fuelwood and wasteland development. Today, it is considered a highly invasive species, especially across Tamil Nadu.

Belonging to the Fabaceae family, it grows as a thorny shrub or small tree (3–10 meters tall), with feathery bipinnate leaves, sharp paired thorns, greenish-yellow flower spikes, and long seed-filled pods. Its ability to thrive in harsh conditions—arid climates, poor soils, and low water availability—makes it extremely resilient. A deep taproot system allows it to access underground water, while rapid seed reproduction enables quick spread.

However, this adaptability comes at a cost. Prosopis juliflora forms dense, impenetrable thickets that suppress native vegetation through allelopathic effects, drastically reducing biodiversity. It also depletes groundwater, encroaches on agricultural and grazing lands, and alters soil chemistry.