Bunchy top virus disease of banana is introduced in India from-

✅Explanation:Bunchy top disease of banana is a serious viral disease that severely affects banana production. It was introduced to India from Sri Lanka in the early 20th century.

🛑Additional Information :
-Banana bunchy top virus (BBTV), genus Babuvirus, family Nanoviridae, causes the most destructive viral disease of banana worldwide but is restricted to some countries in Africa and the Asia-Pacific region.
-Hosts of the virus are predominantly restricted to the plant family Musaceae, and it is transmitted through vegetative planting material and in a circulative, non-propagative manner by the banana aphid (Pentalonia nigronervosa) and P. caladii.
-In banana, disease symptoms include stunting, leaf chlorosis, and rosetting, and a cessation of fruiting, and no natural source of immunity has been confirmed.
-Cytopathological effects and virus replication are restricted to the phloem tissue.
-The virus has isometric virions, 18–20 nm in diameter, separately encapsidating each of the six integral circular ssDNA genome components.