The causal organism of bunchy top of banana is transmitted by

The causal organism of the bunchy top of the banana is transmitted by Pentalonia nigronervosa.
Banana bunchy top is a viral disease caused by a single-stranded DNA virus called the banana bunchy top virus (BBTV). It was first identified in Fiji in 1879.
Banana bunchy top virus (BBTV) is a plant pathogenic virus of the family Nanoviridae known for infecting banana plants and other crops. It is aphid transmitted.
It is known that Banana aphid (Pentalonia nigronervosa) transmits the virus from infected to healthy plants by feeding. Aphids feed on the plant phloem tissues by injecting their thin, flexible style into the epidermis of the plant tissue until it reaches the phloem of the leaves.