Context: The local government in Gujarat has recently planted rows of Conocarpus trees, an exotic mangrove species, from the Sabarmati riverfront in Ahmedabad to the Ram Van "urban forest" in Rajkot. However, due to its "negative impacts on the environment and human health," the state government has now banned planting these trees in forest or non-forest areas.

• Earlier, Telangana had also banned the Conocarpus Trees.

Note: Conocarpus is not the sole exotic plant species to fall out of favor.

• In recent years, Delhi and Kerala have grappled with the need to curb the growth of non-indigenous trees that were adversely affecting local environments, flora, and fauna due to their prolific presence.

About Conocarpus Trees

• Conocarpus is an evergreen species with dark-green shiny leaves.They are fast-growing and can be trimmed into various shapes, making them an attractive choice. 

• Conocarpus is a fast-growing exotic mangrove species.

• Conocarpus is a genus of two species of flowering plants in the family Combretaceae, native to tropical regions of the world.

• One of the species is a widespread mangrove species, the other is restricted to a small area around the southern Red Sea coasts, where it grows alongside seasonal rivers.

• It is native to parts of North and South America, as well as parts of Africa.

• These trees have been the popular choice in recent years for beautification of public spaces to residential societies and factories.

• They are being grown as trees lining public roads as well as hedges along walkways in gardens and are amenable to be trimmed into various shapes.

However, Conocarpus trees have several adverse impacts.For instance:

• Firstly, pollen from the trees have been found to trigger  health issues like cold, cough, asthma, and allergies. 

• Secondly, conocarpus trees penetrate deep into the ground and extend horizontally. On several occasions, it has come to the notice of the authorities that their roots damage underground electricity cables, communication lines, drainage lines and drinking water pipes.

• Thirdly, the conocarpus tree absorbs more water from soil than other species and is a threat to groundwater.