Context: In a special drive to uproot the invasive lantana bushes in the famous Sajjangarh wildlife sanctuary in Rajasthan’s Udaipur district under “Mission Lantana”  which helped in ecological restoration of grasslands and saved biodiversity.
Issue arises by "Lantana" bushes

• Lantana camara, a thicket forming shrub, has covered vast tracts of land in the sanctuary by which it stopping the natural light and nutrition for flora and fauna.
• It was first introduced in 1807, had spread to wildlife reserves, river banks and the Project Tiger areas where it had obliterated native grass and reduced biodiversity. 
• In some regions, the plant has made inroads into pastures and shrunk the cattle grazing areas, affecting the livelihood of villagers.
• The toxic substance in its foliage and ripe berries affected the animals, while its expansion stopped the natural growth of grass and other shrubs. 
• With the herbivores not getting sufficient forage, the prey base for carnivorous animals was declining, leading to ecological disturbances in the food chain.

About Mission Lantana

• It was a special drive to uproot the invasive lantana bushes in the famous Sajjangarh wildlife sanctuary in Rajasthan’s Udaipur district.
• It was a month-and-a-half-long campaign accompanied by the plantation of native species on the cleared patches of land.
• The drive involved collective efforts and ‘shram daan’ (voluntary physical work) by the forest officials, police personnel, wildlife lovers, representatives of voluntary groups and local villagers.

About Sajjangarh Wildlife Sanctuary

• It  is located in Udaipur District of Rajasthan in the southern Aravalli Hills. 
• The area of the sanctuary is 5.19 square kilometres which is located entirely within Girwa Tehsil of Udaipur district.
• The area was made a wildlife sanctuary in 1987. 
• In 2017, an area of 28.7 square kilometres around the boundary of the sanctuary was declared to be an Eco-Sensitive Zone by the Government of India.