Rice Yellow Mottle Virus
Younger leaves are mottled with yellow to green spots. After infection (2 weeks) these spots elongate parallel to the leaf veins. In the center of the yellow streaks, dark patches develop. Older leaves show yellow or orange discoloration. The growth of the plants can be stunted and the yield is reduced.
The virus is transmitted by several species of beetles or grasshoppers as well as cows, rats and donkeys. It is also transmitted through inter-plant movement of sap e.g. via irrigation water or contact between infected and healthy plants and undestroyed/plowed crop residues.
Destroy infected plants and plow under infected plant residues or better burn them.
There is no direct chemical treatment to control the virus