Table 3.

PCR primers used to verify the standard virus samples.

Virus	PCR primers
ArMV	ArMVf: 5′-TTGGCAGCGGATTGGGAGTT-3′
	ArMVr: 5′-ATTGGTTCCAGTTGTTAGTGAC-3′
BPMVa	BPMVf: 5′-ATAGTTCCATTAGAGGGCGTG-3′
	BPMVr: 5′-AGTGGACCATGCTGTGAGAAAC-3′
PNRSV	PNRSVf: 5′-GGTCCCACTCAGGGCTCAAC-3′
	PNRSVr: 5′-CGCAAAAGTGTCGAAATCTAAATC-3′
PPV	PPVf: 5′-ATCAATGGAATGTGGGTGATG-3′
	PPVr: 5′-GTCTCTTGCACAAGAACTATAACCC-3′
PVX	PVXf: 5′-AGTGGTATGGAACTGGATG-3′
	PVXr: 5′-TTATGGTGGTGGTAGAGTGA-3′
SBMV	SBMVf: 5′-ACAGTCCTGACGCACTCTGAG-3′
	SBMVr: 5′-GTACTCACAGCCGTAGAACTCG-3′
TMV	TMVf: 5′-ATGTCTTACAGTATCACTACTCCATCTCAGTT-3′
	TMVr: 5′-GGTTCGCCTGATTTTCAACTTCTATTAT-3′
ToRSV	ToRSVf: 5′-GACGAAGTTATCAATGGCAGCG-3′
	ToRSVr: 5′-TCCGTCCAATCACGCGAATA-3′
TRSV	TRSVf: 5′-AGTCGGGAAGCTGTATAAACTCA-3′
	TRSVr: 5′-CCCCAAACCAAATATGAACAGT-3′
TSWV	TSWVf: 5′-GCTGGAGCTGAGTATAGCAG-3′
	TSWVr: 5′-AGGATTGGAGCCACTGAC-3′

^aBPMV primers were from (Gu et al., 2002). The other PCR primers were designed in this investigation, as explained in Section 2.