Preparation and Application of the Antiserum Specific to the Coat Protein Expressed Prokatically of Papaya ring spot virus Preparation and Application of the Antiserum Specific to the Coat Protein Expressed Prokatically of Papaya ring spot virus Cloning and sequence analysis of CP genes of PRSV from pumpkin Development of a Multiplex RT-PCR Protocol for the Detection of Three Viruses on Benincasa hispida. var. chieh-qua Development of a Multiplex RT-PCR Protocol for the Detection of Three Viruses on Benincasa hispida. var. chieh-qua