TMV strain Inoculated leaves Upper leaves U1 2 6-11 U2 2 6-12 Flavum 2 5-10 30B-U5 2-4 6-12

Experiments were repeated three times with 3 plants in each experiment for each virus

Table 4: Infectivity and symptoms in Nicotiana megalosiphon induced by tobamo virus strains. Timing of the necrotic symptom appearance is shown as days post-inoculation (d p.i.).