What is bunchy top disease of banana?

Stunted plant growth in banana plants is an indication of bunchy top disease. Dark broken bands of green tissues on veins, petioles and leaves can be observed. Marginal chlorosis and curling can be observed in leaves with reduced size. Leaves become upright and brittle. Many leaves are crowded at the top. Branches size will very small. If infected earlier no bunch will be produced. The disease is transmitted primarily by infected suckers. Secondary spread is through the aphid vector.