NEW YELLOWING SYNDROME CAUSED BY RICE TRANSITORY YELLOWING VIRUS ON RICE IN SOME AREAS OF MEKONG DELTA

During winter-spring and summer crops 2011, a yellow syndrome on rice was found in some areas in Mekong Delta. Samples were collected and different experiments were done following Koch postulate. Results including symptomatology, inoculation, detection by RT-PCR and transmission electron microscopy and analysis of sequences obtained from PCR products were all supporting the conclusion of the new yellowing syndrome is caused by Rice transitory yellowing virus, RTYV (synonym: Rice yellow stunt virus, RYSV) belonging to the genus Nucleorhabdovirus, the family Rhabdoviridae and green leafhopper is the vector insect