This is one of the economically important nematode parasite infecting rice crops throughout the world. This nematode was first reported on rice from Japan, and an extensive work has been carried out on this nematode pest.
The brown plant hopper transmits the disease. The early in star nymphs of the insect are more efficient in transmitting the disease than older ones. Five-day-old nymphs are the most efficient transmitters. The virus is acquired within a feeding period of 24 hours.