Discoloured leaf petioles
Banana streak virus
Cause: The banana streak virus (BSV).
Solution: Do not take planting material from infected plants. Eradicate infected plants where symptoms are observed.
Cause: The banana bunchy top virus (BBTV) which is spread on infected planting material and by the banana aphid, Pentalonia nigronervosa. BBTV is not present in tropical Australia, and movement of planting material is controlled by legislation.