The relationship of Cotton leaf roll vitus (CLRV) from Thailand to Cotton leafroll dwarf virus(CLRDV) from Brazil or Cotton bunchy top virus (CBTV) from Australia is unclear as no sequence information is currently published for CLRV inThailand. However, based on the similarities of symptoms and aphid vector transmission, it appears likely that CLRV may also be polerovirus-like virus as is the case for CLRDV and CBTV. The purpose

of this travel was to gain a greater understanding of the field symptoms and diagnosis of

CLRV in Thailand and also to determine if the diagnostic assay being developed for

Brazilian CLRDV as part of the CRDC project (DAQ1201) may also detect Thailand CLRV.