Attention of the government has been drawn to some reports of acid or yellow rain in Moolakkada and Kunjithanni villages of the Idukki district in Kerala, it said in a statement.
"A multi-disciplinary team comprising experts from the Indian Cardamom Research Institute, the Indian Council of Agriculture Research and the Kerala Agriculture University is being set up to visit the affected area for further investigation," it said further.
According to the initial tests conducted on the material found on the cardamom leaf, there is no acidity, fungus or spores, it said, adding that no harmful physical or toxic effect has been noticed in the plants.
The ministry has also not received report of any such phenomenon in the northern region of the country growing large or black cardamom.