Table 2. Infectivity of the SBG51 deltasatellite and SPLCV by grafting or whitefly (B. tabaci) transmission.
| Inoculation method | Host Plant1 | Inoculum2 | No. symptomatic plants/No. inoculated plants | No. infected plants/No. inoculated plants |
Latent period (dpi) | Symptoms3 | |
|---|---|---|---|---|---|---|---|
| Virus | Satellite | ||||||
| Grafting | I. setosa | SPLCV+SBG51 | 2/2 | 2/2 | 2/2 | 20 | SVY, LC, RG |
| SP Beauregard | SPLCV+SBG51 | 0/4 | 3/4 | 3/4 | − | − | |
| SP Promesa | SPLCV+SBG51 | 0/4 | 3/4 | 2/4 | − | − | |
| Insect | I. nil | SPLCV+SBG51 | 8/20 | 10/20 | 0/20 | 17 | VY, SDLC, RG |
| I. setosa | SPLCV+SBG51 | 15/30 | 22/30 | 19/30 | 20 | SVY, LC, RG | |
1SP, sweet potato.
2SPLCV, sweet potato leaf curl virus.
3LC, leaf curling; RG, retarded growth; SDLC, severe downward leaf curling; SVY, severe vein yellowing, VY, vein yellowing.