Specific primers which were designed based on the sequence of CP gene in ArMV by RT-PCR were used for PCR reaction of plant tissue with ArMV and non-ArMV,only the plant tissue with ArMV had the specific amplification of a 364 bp DNA product.The primer was specific to ArMV.The RNA solution of ArMV was diluted by grads to determined sensitivity of the system.The level of detection limit of the primer was 150pg/μL.