What is suction method of emasculation in flowers ?

It’s ideal for small-flowered species. Emasculation is performed in the morning, as soon as the petals open. The anthers are sucked off the blooms using a thin rubber or glass tube coupled to a suction hose. The quantity of suction employed is critical, since it must be enough to suction pollen and anthers but not gynoecium.10% self-pollination is likely to occur in this manner. Although washing the stigma with a jet of water may assist to reduce self-pollination, this procedure does not completely eliminate it.